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Finding the Fourth Proportional to 17,207.60, 25,789.80 and 12,585.20

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Solution

The fourth proportional to 17,207.60, 25,789.80 and 12,585.20 is: 18,862.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,207.60 : 25,789.80 = 12,585.20 : x
  2. Step 2: Convert to fraction form
    17,207.60/25,789.80 = 12,585.20/x
  3. Step 3: Cross multiply
    17,207.60x = 25,789.80 × 12,585.20
  4. Step 4: Simplify right side
    17,207.60x = 324,569,790.96
  5. Step 5: Solve for x
    x = 324,569,790.96/17,207.60
  6. Step 6: Final answer
    x = 18,862.00

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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.