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Finding the Fourth Proportional to 17,761.60, 26,680.80 and 17,108.80

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Solution

The fourth proportional to 17,761.60, 26,680.80 and 17,108.80 is: 25,700.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,761.60 : 26,680.80 = 17,108.80 : x
  2. Step 2: Convert to fraction form
    17,761.60/26,680.80 = 17,108.80/x
  3. Step 3: Cross multiply
    17,761.60x = 26,680.80 × 17,108.80
  4. Step 4: Simplify right side
    17,761.60x = 456,476,471.04
  5. Step 5: Solve for x
    x = 456,476,471.04/17,761.60
  6. Step 6: Final answer
    x = 25,700.19

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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.