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Finding the Fourth Proportional to 18,711,672.30, 28,067,508.45 and 13,672,824.30

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Solution

The fourth proportional to 18,711,672.30, 28,067,508.45 and 13,672,824.30 is: 20,509,236.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,711,672.30 : 28,067,508.45 = 13,672,824.30 : x
  2. Step 2: Convert to fraction form
    18,711,672.30/28,067,508.45 = 13,672,824.30/x
  3. Step 3: Cross multiply
    18,711,672.30x = 28,067,508.45 × 13,672,824.30
  4. Step 4: Simplify right side
    18,711,672.30x = 383,762,111,575,615.38
  5. Step 5: Solve for x
    x = 383,762,111,575,615.38/18,711,672.30
  6. Step 6: Final answer
    x = 20,509,236.45

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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.