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Finding the Fourth Proportional to 20,479,802.40, 30,719,493.20 and 11,838,404.40

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Solution

The fourth proportional to 20,479,802.40, 30,719,493.20 and 11,838,404.40 is: 17,757,484.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,479,802.40 : 30,719,493.20 = 11,838,404.40 : x
  2. Step 2: Convert to fraction form
    20,479,802.40/30,719,493.20 = 11,838,404.40/x
  3. Step 3: Cross multiply
    20,479,802.40x = 30,719,493.20 × 11,838,404.40
  4. Step 4: Simplify right side
    20,479,802.40x = 363,669,783,464,650.06
  5. Step 5: Solve for x
    x = 363,669,783,464,650.06/20,479,802.40
  6. Step 6: Final answer
    x = 17,757,484.98

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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.