Home / 12,428.66-17,145.77-7,390.05

Finding the Fourth Proportional to 12,428.66, 17,145.77 and 7,390.05

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Solution

The fourth proportional to 12,428.66, 17,145.77 and 7,390.05 is: 10,194.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,428.66 : 17,145.77 = 7,390.05 : x
  2. Step 2: Convert to fraction form
    12,428.66/17,145.77 = 7,390.05/x
  3. Step 3: Cross multiply
    12,428.66x = 17,145.77 × 7,390.05
  4. Step 4: Simplify right side
    12,428.66x = 126,708,060.64
  5. Step 5: Solve for x
    x = 126,708,060.64/12,428.66
  6. Step 6: Final answer
    x = 10,194.83

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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.