Home / 21,319.11-29,414.68-20,478.33

Finding the Fourth Proportional to 21,319.11, 29,414.68 and 20,478.33

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Solution

The fourth proportional to 21,319.11, 29,414.68 and 20,478.33 is: 28,254.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,319.11 : 29,414.68 = 20,478.33 : x
  2. Step 2: Convert to fraction form
    21,319.11/29,414.68 = 20,478.33/x
  3. Step 3: Cross multiply
    21,319.11x = 29,414.68 × 20,478.33
  4. Step 4: Simplify right side
    21,319.11x = 602,363,472.69
  5. Step 5: Solve for x
    x = 602,363,472.69/21,319.11
  6. Step 6: Final answer
    x = 28,254.63

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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.