Home / 12,407.28-17,120.52-7,371.60

Finding the Fourth Proportional to 12,407.28, 17,120.52 and 7,371.60

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Solution

The fourth proportional to 12,407.28, 17,120.52 and 7,371.60 is: 10,171.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,407.28 : 17,120.52 = 7,371.60 : x
  2. Step 2: Convert to fraction form
    12,407.28/17,120.52 = 7,371.60/x
  3. Step 3: Cross multiply
    12,407.28x = 17,120.52 × 7,371.60
  4. Step 4: Simplify right side
    12,407.28x = 126,205,625.23
  5. Step 5: Solve for x
    x = 126,205,625.23/12,407.28
  6. Step 6: Final answer
    x = 10,171.90

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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.