Home / 18,489.28-25,515.14-10,105.78

Finding the Fourth Proportional to 18,489.28, 25,515.14 and 10,105.78

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Solution

The fourth proportional to 18,489.28, 25,515.14 and 10,105.78 is: 13,945.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,489.28 : 25,515.14 = 10,105.78 : x
  2. Step 2: Convert to fraction form
    18,489.28/25,515.14 = 10,105.78/x
  3. Step 3: Cross multiply
    18,489.28x = 25,515.14 × 10,105.78
  4. Step 4: Simplify right side
    18,489.28x = 257,850,391.51
  5. Step 5: Solve for x
    x = 257,850,391.51/18,489.28
  6. Step 6: Final answer
    x = 13,945.94

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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.