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Finding the Fourth Proportional to 18,209.12, 25,125 and 10,251.68

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Solution

The fourth proportional to 18,209.12, 25,125 and 10,251.68 is: 14,145.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,209.12 : 25,125 = 10,251.68 : x
  2. Step 2: Convert to fraction form
    18,209.12/25,125 = 10,251.68/x
  3. Step 3: Cross multiply
    18,209.12x = 25,125 × 10,251.68
  4. Step 4: Simplify right side
    18,209.12x = 257,573,460
  5. Step 5: Solve for x
    x = 257,573,460/18,209.12
  6. Step 6: Final answer
    x = 14,145.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.