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Finding the Fourth Proportional to 18,658.53, 25,750.59 and 13,934.61

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Solution

The fourth proportional to 18,658.53, 25,750.59 and 13,934.61 is: 19,231.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,658.53 : 25,750.59 = 13,934.61 : x
  2. Step 2: Convert to fraction form
    18,658.53/25,750.59 = 13,934.61/x
  3. Step 3: Cross multiply
    18,658.53x = 25,750.59 × 13,934.61
  4. Step 4: Simplify right side
    18,658.53x = 358,824,428.92
  5. Step 5: Solve for x
    x = 358,824,428.92/18,658.53
  6. Step 6: Final answer
    x = 19,231.12

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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.