Home / 13,422.24-20,129.26-6,398.55

Finding the Fourth Proportional to 13,422.24, 20,129.26 and 6,398.55

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Solution

The fourth proportional to 13,422.24, 20,129.26 and 6,398.55 is: 9,595.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,422.24 : 20,129.26 = 6,398.55 : x
  2. Step 2: Convert to fraction form
    13,422.24/20,129.26 = 6,398.55/x
  3. Step 3: Cross multiply
    13,422.24x = 20,129.26 × 6,398.55
  4. Step 4: Simplify right side
    13,422.24x = 128,798,060.58
  5. Step 5: Solve for x
    x = 128,798,060.58/13,422.24
  6. Step 6: Final answer
    x = 9,595.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.