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Finding the Fourth Proportional to 18,806,672.60, 28,210,008.90 and 17,672,931.80

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Solution

The fourth proportional to 18,806,672.60, 28,210,008.90 and 17,672,931.80 is: 26,509,397.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,806,672.60 : 28,210,008.90 = 17,672,931.80 : x
  2. Step 2: Convert to fraction form
    18,806,672.60/28,210,008.90 = 17,672,931.80/x
  3. Step 3: Cross multiply
    18,806,672.60x = 28,210,008.90 × 17,672,931.80
  4. Step 4: Simplify right side
    18,806,672.60x = 498,553,563,367,093
  5. Step 5: Solve for x
    x = 498,553,563,367,093/18,806,672.60
  6. Step 6: Final answer
    x = 26,509,397.70

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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.