Home / 20,989,929,976.80-31,496,988,200.40-7,913,111,647.20

Finding the Fourth Proportional to 20,989,929,976.80, 31,496,988,200.40 and 7,913,111,647.20

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Solution

The fourth proportional to 20,989,929,976.80, 31,496,988,200.40 and 7,913,111,647.20 is: 11,874,226,567.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989,929,976.80 : 31,496,988,200.40 = 7,913,111,647.20 : x
  2. Step 2: Convert to fraction form
    20,989,929,976.80/31,496,988,200.40 = 7,913,111,647.20/x
  3. Step 3: Cross multiply
    20,989,929,976.80x = 31,496,988,200.40 × 7,913,111,647.20
  4. Step 4: Simplify right side
    20,989,929,976.80x = 249,239,184,180,306,214,912
  5. Step 5: Solve for x
    x = 249,239,184,180,306,214,912/20,989,929,976.80
  6. Step 6: Final answer
    x = 11,874,226,567.49

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.