Home / 20,406.80-30,610.20-17,126.30

Finding the Fourth Proportional to 20,406.80, 30,610.20 and 17,126.30

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Solution

The fourth proportional to 20,406.80, 30,610.20 and 17,126.30 is: 25,689.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,406.80 : 30,610.20 = 17,126.30 : x
  2. Step 2: Convert to fraction form
    20,406.80/30,610.20 = 17,126.30/x
  3. Step 3: Cross multiply
    20,406.80x = 30,610.20 × 17,126.30
  4. Step 4: Simplify right side
    20,406.80x = 524,239,468.26
  5. Step 5: Solve for x
    x = 524,239,468.26/20,406.80
  6. Step 6: Final answer
    x = 25,689.45

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Similar ratio
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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.