Home / 13,279.28-19,918.92-5,479.52

Finding the Fourth Proportional to 13,279.28, 19,918.92 and 5,479.52

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Solution

The fourth proportional to 13,279.28, 19,918.92 and 5,479.52 is: 8,219.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.28 : 19,918.92 = 5,479.52 : x
  2. Step 2: Convert to fraction form
    13,279.28/19,918.92 = 5,479.52/x
  3. Step 3: Cross multiply
    13,279.28x = 19,918.92 × 5,479.52
  4. Step 4: Simplify right side
    13,279.28x = 109,146,120.52
  5. Step 5: Solve for x
    x = 109,146,120.52/13,279.28
  6. Step 6: Final answer
    x = 8,219.28

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1.5x scale

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.