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Finding the Fourth Proportional to 15,745,978.20, 23,618,957.58 and 12,156,984.84

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Solution

The fourth proportional to 15,745,978.20, 23,618,957.58 and 12,156,984.84 is: 18,235,469.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,745,978.20 : 23,618,957.58 = 12,156,984.84 : x
  2. Step 2: Convert to fraction form
    15,745,978.20/23,618,957.58 = 12,156,984.84/x
  3. Step 3: Cross multiply
    15,745,978.20x = 23,618,957.58 × 12,156,984.84
  4. Step 4: Simplify right side
    15,745,978.20x = 287,135,309,236,663.06
  5. Step 5: Solve for x
    x = 287,135,309,236,663.06/15,745,978.20
  6. Step 6: Final answer
    x = 18,235,469.76

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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.