Home / 19,279.14-28,918.68-5,428.14

Finding the Fourth Proportional to 19,279.14, 28,918.68 and 5,428.14

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Solution

The fourth proportional to 19,279.14, 28,918.68 and 5,428.14 is: 8,142.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,279.14 : 28,918.68 = 5,428.14 : x
  2. Step 2: Convert to fraction form
    19,279.14/28,918.68 = 5,428.14/x
  3. Step 3: Cross multiply
    19,279.14x = 28,918.68 × 5,428.14
  4. Step 4: Simplify right side
    19,279.14x = 156,974,643.66
  5. Step 5: Solve for x
    x = 156,974,643.66/19,279.14
  6. Step 6: Final answer
    x = 8,142.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.