Home / 18,761.28-25,889.40-10,377.78

Finding the Fourth Proportional to 18,761.28, 25,889.40 and 10,377.78

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Solution

The fourth proportional to 18,761.28, 25,889.40 and 10,377.78 is: 14,320.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,761.28 : 25,889.40 = 10,377.78 : x
  2. Step 2: Convert to fraction form
    18,761.28/25,889.40 = 10,377.78/x
  3. Step 3: Cross multiply
    18,761.28x = 25,889.40 × 10,377.78
  4. Step 4: Simplify right side
    18,761.28x = 268,674,497.53
  5. Step 5: Solve for x
    x = 268,674,497.53/18,761.28
  6. Step 6: Final answer
    x = 14,320.69

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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.