Home / 21,292.71-29,171.15-20,494.62

Finding the Fourth Proportional to 21,292.71, 29,171.15 and 20,494.62

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Solution

The fourth proportional to 21,292.71, 29,171.15 and 20,494.62 is: 28,077.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,292.71 : 29,171.15 = 20,494.62 : x
  2. Step 2: Convert to fraction form
    21,292.71/29,171.15 = 20,494.62/x
  3. Step 3: Cross multiply
    21,292.71x = 29,171.15 × 20,494.62
  4. Step 4: Simplify right side
    21,292.71x = 597,851,531.74
  5. Step 5: Solve for x
    x = 597,851,531.74/21,292.71
  6. Step 6: Final answer
    x = 28,077.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.