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Finding the Fourth Proportional to 12,652,672.40, 18,979,008.60 and 12,156,660.80

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Solution

The fourth proportional to 12,652,672.40, 18,979,008.60 and 12,156,660.80 is: 18,234,991.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,652,672.40 : 18,979,008.60 = 12,156,660.80 : x
  2. Step 2: Convert to fraction form
    12,652,672.40/18,979,008.60 = 12,156,660.80/x
  3. Step 3: Cross multiply
    12,652,672.40x = 18,979,008.60 × 12,156,660.80
  4. Step 4: Simplify right side
    12,652,672.40x = 230,721,369,870,482.91
  5. Step 5: Solve for x
    x = 230,721,369,870,482.91/12,652,672.40
  6. Step 6: Final answer
    x = 18,234,991.20

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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.