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Finding the Fourth Proportional to 18,750.60, 25,878.42 and 10,789.92

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Solution

The fourth proportional to 18,750.60, 25,878.42 and 10,789.92 is: 14,891.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,750.60 : 25,878.42 = 10,789.92 : x
  2. Step 2: Convert to fraction form
    18,750.60/25,878.42 = 10,789.92/x
  3. Step 3: Cross multiply
    18,750.60x = 25,878.42 × 10,789.92
  4. Step 4: Simplify right side
    18,750.60x = 279,226,081.53
  5. Step 5: Solve for x
    x = 279,226,081.53/18,750.60
  6. Step 6: Final answer
    x = 14,891.58

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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.