Home / 20,357.82-28,098.65-11,979.18

Finding the Fourth Proportional to 20,357.82, 28,098.65 and 11,979.18

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Solution

The fourth proportional to 20,357.82, 28,098.65 and 11,979.18 is: 16,534.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,357.82 : 28,098.65 = 11,979.18 : x
  2. Step 2: Convert to fraction form
    20,357.82/28,098.65 = 11,979.18/x
  3. Step 3: Cross multiply
    20,357.82x = 28,098.65 × 11,979.18
  4. Step 4: Simplify right side
    20,357.82x = 336,598,726.21
  5. Step 5: Solve for x
    x = 336,598,726.21/20,357.82
  6. Step 6: Final answer
    x = 16,534.12

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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.