Home / 20,721.38-28,570.39-16,123.48

Finding the Fourth Proportional to 20,721.38, 28,570.39 and 16,123.48

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Solution

The fourth proportional to 20,721.38, 28,570.39 and 16,123.48 is: 22,230.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.38 : 28,570.39 = 16,123.48 : x
  2. Step 2: Convert to fraction form
    20,721.38/28,570.39 = 16,123.48/x
  3. Step 3: Cross multiply
    20,721.38x = 28,570.39 × 16,123.48
  4. Step 4: Simplify right side
    20,721.38x = 460,654,111.76
  5. Step 5: Solve for x
    x = 460,654,111.76/20,721.38
  6. Step 6: Final answer
    x = 22,230.86

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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.