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Finding the Fourth Proportional to 18,691.63, 25,788.75 and 10,624.68

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Solution

The fourth proportional to 18,691.63, 25,788.75 and 10,624.68 is: 14,658.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,691.63 : 25,788.75 = 10,624.68 : x
  2. Step 2: Convert to fraction form
    18,691.63/25,788.75 = 10,624.68/x
  3. Step 3: Cross multiply
    18,691.63x = 25,788.75 × 10,624.68
  4. Step 4: Simplify right side
    18,691.63x = 273,997,216.35
  5. Step 5: Solve for x
    x = 273,997,216.35/18,691.63
  6. Step 6: Final answer
    x = 14,658.82

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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.