Home / 18,487.28-25,512.39-10,103.78

Finding the Fourth Proportional to 18,487.28, 25,512.39 and 10,103.78

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Solution

The fourth proportional to 18,487.28, 25,512.39 and 10,103.78 is: 13,943.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,487.28 : 25,512.39 = 10,103.78 : x
  2. Step 2: Convert to fraction form
    18,487.28/25,512.39 = 10,103.78/x
  3. Step 3: Cross multiply
    18,487.28x = 25,512.39 × 10,103.78
  4. Step 4: Simplify right side
    18,487.28x = 257,771,575.83
  5. Step 5: Solve for x
    x = 257,771,575.83/18,487.28
  6. Step 6: Final answer
    x = 13,943.19

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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.