Home / 8,078.40-11,141.92-5,279.04

Finding the Fourth Proportional to 8,078.40, 11,141.92 and 5,279.04

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Solution

The fourth proportional to 8,078.40, 11,141.92 and 5,279.04 is: 7,280.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,078.40 : 11,141.92 = 5,279.04 : x
  2. Step 2: Convert to fraction form
    8,078.40/11,141.92 = 5,279.04/x
  3. Step 3: Cross multiply
    8,078.40x = 11,141.92 × 5,279.04
  4. Step 4: Simplify right side
    8,078.40x = 58,818,641.36
  5. Step 5: Solve for x
    x = 58,818,641.36/8,078.40
  6. Step 6: Final answer
    x = 7,280.98

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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.