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Finding the Fourth Proportional to 16,751.60, 25,105.80 and 12,129.20

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Solution

The fourth proportional to 16,751.60, 25,105.80 and 12,129.20 is: 18,178.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,751.60 : 25,105.80 = 12,129.20 : x
  2. Step 2: Convert to fraction form
    16,751.60/25,105.80 = 12,129.20/x
  3. Step 3: Cross multiply
    16,751.60x = 25,105.80 × 12,129.20
  4. Step 4: Simplify right side
    16,751.60x = 304,513,269.36
  5. Step 5: Solve for x
    x = 304,513,269.36/16,751.60
  6. Step 6: Final answer
    x = 18,178.16

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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.