Home / 20,561.27-28,422.38-18,345.11

Finding the Fourth Proportional to 20,561.27, 28,422.38 and 18,345.11

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Solution

The fourth proportional to 20,561.27, 28,422.38 and 18,345.11 is: 25,358.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.27 : 28,422.38 = 18,345.11 : x
  2. Step 2: Convert to fraction form
    20,561.27/28,422.38 = 18,345.11/x
  3. Step 3: Cross multiply
    20,561.27x = 28,422.38 × 18,345.11
  4. Step 4: Simplify right side
    20,561.27x = 521,411,595.84
  5. Step 5: Solve for x
    x = 521,411,595.84/20,561.27
  6. Step 6: Final answer
    x = 25,358.92

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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.