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Finding the Fourth Proportional to 17,839.80, 26,759.70 and 12,655.80

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Solution

The fourth proportional to 17,839.80, 26,759.70 and 12,655.80 is: 18,983.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,839.80 : 26,759.70 = 12,655.80 : x
  2. Step 2: Convert to fraction form
    17,839.80/26,759.70 = 12,655.80/x
  3. Step 3: Cross multiply
    17,839.80x = 26,759.70 × 12,655.80
  4. Step 4: Simplify right side
    17,839.80x = 338,665,411.26
  5. Step 5: Solve for x
    x = 338,665,411.26/17,839.80
  6. Step 6: Final answer
    x = 18,983.70

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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.