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Finding the Fourth Proportional to 25,884.60, 38,826.90 and 18,511.80

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Solution

The fourth proportional to 25,884.60, 38,826.90 and 18,511.80 is: 27,767.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,884.60 : 38,826.90 = 18,511.80 : x
  2. Step 2: Convert to fraction form
    25,884.60/38,826.90 = 18,511.80/x
  3. Step 3: Cross multiply
    25,884.60x = 38,826.90 × 18,511.80
  4. Step 4: Simplify right side
    25,884.60x = 718,755,807.42
  5. Step 5: Solve for x
    x = 718,755,807.42/25,884.60
  6. Step 6: Final answer
    x = 27,767.70

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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.