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Finding the Fourth Proportional to 17,170.40, 25,726.80 and 8,386.40

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Solution

The fourth proportional to 17,170.40, 25,726.80 and 8,386.40 is: 12,565.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,170.40 : 25,726.80 = 8,386.40 : x
  2. Step 2: Convert to fraction form
    17,170.40/25,726.80 = 8,386.40/x
  3. Step 3: Cross multiply
    17,170.40x = 25,726.80 × 8,386.40
  4. Step 4: Simplify right side
    17,170.40x = 215,755,235.52
  5. Step 5: Solve for x
    x = 215,755,235.52/17,170.40
  6. Step 6: Final answer
    x = 12,565.53

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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.