Home / 21,280.23-31,871.13-20,542.13

Finding the Fourth Proportional to 21,280.23, 31,871.13 and 20,542.13

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Solution

The fourth proportional to 21,280.23, 31,871.13 and 20,542.13 is: 30,765.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,280.23 : 31,871.13 = 20,542.13 : x
  2. Step 2: Convert to fraction form
    21,280.23/31,871.13 = 20,542.13/x
  3. Step 3: Cross multiply
    21,280.23x = 31,871.13 × 20,542.13
  4. Step 4: Simplify right side
    21,280.23x = 654,700,736.35
  5. Step 5: Solve for x
    x = 654,700,736.35/21,280.23
  6. Step 6: Final answer
    x = 30,765.68

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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.