Home / 12,120.28-16,727.25-7,407.70

Finding the Fourth Proportional to 12,120.28, 16,727.25 and 7,407.70

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Solution

The fourth proportional to 12,120.28, 16,727.25 and 7,407.70 is: 10,223.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.28 : 16,727.25 = 7,407.70 : x
  2. Step 2: Convert to fraction form
    12,120.28/16,727.25 = 7,407.70/x
  3. Step 3: Cross multiply
    12,120.28x = 16,727.25 × 7,407.70
  4. Step 4: Simplify right side
    12,120.28x = 123,910,449.83
  5. Step 5: Solve for x
    x = 123,910,449.83/12,120.28
  6. Step 6: Final answer
    x = 10,223.40

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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.