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Finding the Fourth Proportional to 13,987.53, 20,981.25 and 9,591.66

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Solution

The fourth proportional to 13,987.53, 20,981.25 and 9,591.66 is: 14,387.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,987.53 : 20,981.25 = 9,591.66 : x
  2. Step 2: Convert to fraction form
    13,987.53/20,981.25 = 9,591.66/x
  3. Step 3: Cross multiply
    13,987.53x = 20,981.25 × 9,591.66
  4. Step 4: Simplify right side
    13,987.53x = 201,245,016.38
  5. Step 5: Solve for x
    x = 201,245,016.38/13,987.53
  6. Step 6: Final answer
    x = 14,387.46

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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.