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Finding the Fourth Proportional to 18,115.53, 24,986.79 and 17,505.91

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Solution

The fourth proportional to 18,115.53, 24,986.79 and 17,505.91 is: 24,145.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,115.53 : 24,986.79 = 17,505.91 : x
  2. Step 2: Convert to fraction form
    18,115.53/24,986.79 = 17,505.91/x
  3. Step 3: Cross multiply
    18,115.53x = 24,986.79 × 17,505.91
  4. Step 4: Simplify right side
    18,115.53x = 437,416,301.45
  5. Step 5: Solve for x
    x = 437,416,301.45/18,115.53
  6. Step 6: Final answer
    x = 24,145.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.