Home / 20,497.82-28,279.38-13,428.14

Finding the Fourth Proportional to 20,497.82, 28,279.38 and 13,428.14

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Solution

The fourth proportional to 20,497.82, 28,279.38 and 13,428.14 is: 18,525.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,497.82 : 28,279.38 = 13,428.14 : x
  2. Step 2: Convert to fraction form
    20,497.82/28,279.38 = 13,428.14/x
  3. Step 3: Cross multiply
    20,497.82x = 28,279.38 × 13,428.14
  4. Step 4: Simplify right side
    20,497.82x = 379,739,473.75
  5. Step 5: Solve for x
    x = 379,739,473.75/20,497.82
  6. Step 6: Final answer
    x = 18,525.85

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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.