Home / 20,422.57-30,610.89-10,399.19

Finding the Fourth Proportional to 20,422.57, 30,610.89 and 10,399.19

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Solution

The fourth proportional to 20,422.57, 30,610.89 and 10,399.19 is: 15,587.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,422.57 : 30,610.89 = 10,399.19 : x
  2. Step 2: Convert to fraction form
    20,422.57/30,610.89 = 10,399.19/x
  3. Step 3: Cross multiply
    20,422.57x = 30,610.89 × 10,399.19
  4. Step 4: Simplify right side
    20,422.57x = 318,328,461.18
  5. Step 5: Solve for x
    x = 318,328,461.18/20,422.57
  6. Step 6: Final answer
    x = 15,587.09

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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.