Home / 21,002,212.10-31,440,332.55-12,478,160.90

Finding the Fourth Proportional to 21,002,212.10, 31,440,332.55 and 12,478,160.90

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Solution

The fourth proportional to 21,002,212.10, 31,440,332.55 and 12,478,160.90 is: 18,679,819.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002,212.10 : 31,440,332.55 = 12,478,160.90 : x
  2. Step 2: Convert to fraction form
    21,002,212.10/31,440,332.55 = 12,478,160.90/x
  3. Step 3: Cross multiply
    21,002,212.10x = 31,440,332.55 × 12,478,160.90
  4. Step 4: Simplify right side
    21,002,212.10x = 392,317,528,308,407.31
  5. Step 5: Solve for x
    x = 392,317,528,308,407.31/21,002,212.10
  6. Step 6: Final answer
    x = 18,679,819.37

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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.