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Finding the Fourth Proportional to 12,478,649.20, 18,700,477.80 and 9,924,233.20

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Solution

The fourth proportional to 12,478,649.20, 18,700,477.80 and 9,924,233.20 is: 14,872,435.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,478,649.20 : 18,700,477.80 = 9,924,233.20 : x
  2. Step 2: Convert to fraction form
    12,478,649.20/18,700,477.80 = 9,924,233.20/x
  3. Step 3: Cross multiply
    12,478,649.20x = 18,700,477.80 × 9,924,233.20
  4. Step 4: Simplify right side
    12,478,649.20x = 185,587,902,638,622.97
  5. Step 5: Solve for x
    x = 185,587,902,638,622.97/12,478,649.20
  6. Step 6: Final answer
    x = 14,872,435.28

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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.