Home / 10,120.28-15,148.01-5,428.76

Finding the Fourth Proportional to 10,120.28, 15,148.01 and 5,428.76

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Solution

The fourth proportional to 10,120.28, 15,148.01 and 5,428.76 is: 8,125.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,120.28 : 15,148.01 = 5,428.76 : x
  2. Step 2: Convert to fraction form
    10,120.28/15,148.01 = 5,428.76/x
  3. Step 3: Cross multiply
    10,120.28x = 15,148.01 × 5,428.76
  4. Step 4: Simplify right side
    10,120.28x = 82,234,848.60
  5. Step 5: Solve for x
    x = 82,234,848.60/10,120.28
  6. Step 6: Final answer
    x = 8,125.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.