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Finding the Fourth Proportional to 16,688.20, 25,061.10 and 8,912.20

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Solution

The fourth proportional to 16,688.20, 25,061.10 and 8,912.20 is: 13,383.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,688.20 : 25,061.10 = 8,912.20 : x
  2. Step 2: Convert to fraction form
    16,688.20/25,061.10 = 8,912.20/x
  3. Step 3: Cross multiply
    16,688.20x = 25,061.10 × 8,912.20
  4. Step 4: Simplify right side
    16,688.20x = 223,349,535.42
  5. Step 5: Solve for x
    x = 223,349,535.42/16,688.20
  6. Step 6: Final answer
    x = 13,383.68

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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.