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Finding the Fourth Proportional to 18,285.60, 25,123.20 and 14,737.80

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Solution

The fourth proportional to 18,285.60, 25,123.20 and 14,737.80 is: 20,248.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,285.60 : 25,123.20 = 14,737.80 : x
  2. Step 2: Convert to fraction form
    18,285.60/25,123.20 = 14,737.80/x
  3. Step 3: Cross multiply
    18,285.60x = 25,123.20 × 14,737.80
  4. Step 4: Simplify right side
    18,285.60x = 370,260,696.96
  5. Step 5: Solve for x
    x = 370,260,696.96/18,285.60
  6. Step 6: Final answer
    x = 20,248.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.