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Finding the Fourth Proportional to 18,761.76, 25,893 and 10,808.64

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Solution

The fourth proportional to 18,761.76, 25,893 and 10,808.64 is: 14,916.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,761.76 : 25,893 = 10,808.64 : x
  2. Step 2: Convert to fraction form
    18,761.76/25,893 = 10,808.64/x
  3. Step 3: Cross multiply
    18,761.76x = 25,893 × 10,808.64
  4. Step 4: Simplify right side
    18,761.76x = 279,868,115.52
  5. Step 5: Solve for x
    x = 279,868,115.52/18,761.76
  6. Step 6: Final answer
    x = 14,916.94

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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.