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Finding the Fourth Proportional to 18,737.80, 28,124.90 and 14,622.60

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Solution

The fourth proportional to 18,737.80, 28,124.90 and 14,622.60 is: 21,948.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,737.80 : 28,124.90 = 14,622.60 : x
  2. Step 2: Convert to fraction form
    18,737.80/28,124.90 = 14,622.60/x
  3. Step 3: Cross multiply
    18,737.80x = 28,124.90 × 14,622.60
  4. Step 4: Simplify right side
    18,737.80x = 411,259,162.74
  5. Step 5: Solve for x
    x = 411,259,162.74/18,737.80
  6. Step 6: Final answer
    x = 21,948.10

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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.