Home / 15,154.28-20,910.42-8,439.74

Finding the Fourth Proportional to 15,154.28, 20,910.42 and 8,439.74

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Solution

The fourth proportional to 15,154.28, 20,910.42 and 8,439.74 is: 11,645.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,154.28 : 20,910.42 = 8,439.74 : x
  2. Step 2: Convert to fraction form
    15,154.28/20,910.42 = 8,439.74/x
  3. Step 3: Cross multiply
    15,154.28x = 20,910.42 × 8,439.74
  4. Step 4: Simplify right side
    15,154.28x = 176,478,508.09
  5. Step 5: Solve for x
    x = 176,478,508.09/15,154.28
  6. Step 6: Final answer
    x = 11,645.46

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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.