Home / 20,040.32-27,655.91-12,489.69

Finding the Fourth Proportional to 20,040.32, 27,655.91 and 12,489.69

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Solution

The fourth proportional to 20,040.32, 27,655.91 and 12,489.69 is: 17,235.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,040.32 : 27,655.91 = 12,489.69 : x
  2. Step 2: Convert to fraction form
    20,040.32/27,655.91 = 12,489.69/x
  3. Step 3: Cross multiply
    20,040.32x = 27,655.91 × 12,489.69
  4. Step 4: Simplify right side
    20,040.32x = 345,413,680.12
  5. Step 5: Solve for x
    x = 345,413,680.12/20,040.32
  6. Step 6: Final answer
    x = 17,235.94

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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.