Home / 12,445.28-17,174.18-7,139.76

Finding the Fourth Proportional to 12,445.28, 17,174.18 and 7,139.76

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Solution

The fourth proportional to 12,445.28, 17,174.18 and 7,139.76 is: 9,852.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,445.28 : 17,174.18 = 7,139.76 : x
  2. Step 2: Convert to fraction form
    12,445.28/17,174.18 = 7,139.76/x
  3. Step 3: Cross multiply
    12,445.28x = 17,174.18 × 7,139.76
  4. Step 4: Simplify right side
    12,445.28x = 122,619,487.70
  5. Step 5: Solve for x
    x = 122,619,487.70/12,445.28
  6. Step 6: Final answer
    x = 9,852.69

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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.