Home / 20,490.21-28,276.17-11,537.69

Finding the Fourth Proportional to 20,490.21, 28,276.17 and 11,537.69

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Solution

The fourth proportional to 20,490.21, 28,276.17 and 11,537.69 is: 15,921.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,490.21 : 28,276.17 = 11,537.69 : x
  2. Step 2: Convert to fraction form
    20,490.21/28,276.17 = 11,537.69/x
  3. Step 3: Cross multiply
    20,490.21x = 28,276.17 × 11,537.69
  4. Step 4: Simplify right side
    20,490.21x = 326,241,542.47
  5. Step 5: Solve for x
    x = 326,241,542.47/20,490.21
  6. Step 6: Final answer
    x = 15,921.83

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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.