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Finding the Fourth Proportional to 18,785.78, 25,926.18 and 10,402.28

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Solution

The fourth proportional to 18,785.78, 25,926.18 and 10,402.28 is: 14,356.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,785.78 : 25,926.18 = 10,402.28 : x
  2. Step 2: Convert to fraction form
    18,785.78/25,926.18 = 10,402.28/x
  3. Step 3: Cross multiply
    18,785.78x = 25,926.18 × 10,402.28
  4. Step 4: Simplify right side
    18,785.78x = 269,691,383.69
  5. Step 5: Solve for x
    x = 269,691,383.69/18,785.78
  6. Step 6: Final answer
    x = 14,356.15

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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.