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Finding the Fourth Proportional to 18,869.60, 28,288.20 and 16,901.30

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Solution

The fourth proportional to 18,869.60, 28,288.20 and 16,901.30 is: 25,337.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,869.60 : 28,288.20 = 16,901.30 : x
  2. Step 2: Convert to fraction form
    18,869.60/28,288.20 = 16,901.30/x
  3. Step 3: Cross multiply
    18,869.60x = 28,288.20 × 16,901.30
  4. Step 4: Simplify right side
    18,869.60x = 478,107,354.66
  5. Step 5: Solve for x
    x = 478,107,354.66/18,869.60
  6. Step 6: Final answer
    x = 25,337.44

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1.5x scale

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.