Home / 20,918,116.48-31,378,764.48-8,133,128.32

Finding the Fourth Proportional to 20,918,116.48, 31,378,764.48 and 8,133,128.32

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Solution

The fourth proportional to 20,918,116.48, 31,378,764.48 and 8,133,128.32 is: 12,200,310.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918,116.48 : 31,378,764.48 = 8,133,128.32 : x
  2. Step 2: Convert to fraction form
    20,918,116.48/31,378,764.48 = 8,133,128.32/x
  3. Step 3: Cross multiply
    20,918,116.48x = 31,378,764.48 × 8,133,128.32
  4. Step 4: Simplify right side
    20,918,116.48x = 255,207,518,038,898.09
  5. Step 5: Solve for x
    x = 255,207,518,038,898.09/20,918,116.48
  6. Step 6: Final answer
    x = 12,200,310.59

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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.