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Finding the Fourth Proportional to 19,839.90, 29,759.86 and 5,988.90

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Solution

The fourth proportional to 19,839.90, 29,759.86 and 5,988.90 is: 8,983.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,839.90 : 29,759.86 = 5,988.90 : x
  2. Step 2: Convert to fraction form
    19,839.90/29,759.86 = 5,988.90/x
  3. Step 3: Cross multiply
    19,839.90x = 29,759.86 × 5,988.90
  4. Step 4: Simplify right side
    19,839.90x = 178,228,825.55
  5. Step 5: Solve for x
    x = 178,228,825.55/19,839.90
  6. Step 6: Final answer
    x = 8,983.35

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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.