Home / 20,989,930,820.80-31,496,989,466.40-7,913,112,491.20

Finding the Fourth Proportional to 20,989,930,820.80, 31,496,989,466.40 and 7,913,112,491.20

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Solution

The fourth proportional to 20,989,930,820.80, 31,496,989,466.40 and 7,913,112,491.20 is: 11,874,227,833.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989,930,820.80 : 31,496,989,466.40 = 7,913,112,491.20 : x
  2. Step 2: Convert to fraction form
    20,989,930,820.80/31,496,989,466.40 = 7,913,112,491.20/x
  3. Step 3: Cross multiply
    20,989,930,820.80x = 31,496,989,466.40 × 7,913,112,491.20
  4. Step 4: Simplify right side
    20,989,930,820.80x = 249,239,220,781,764,673,536
  5. Step 5: Solve for x
    x = 249,239,220,781,764,673,536/20,989,930,820.80
  6. Step 6: Final answer
    x = 11,874,227,833.79

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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.