Home / 5,275.20-7,279.55-2,885.11

Finding the Fourth Proportional to 5,275.20, 7,279.55 and 2,885.11

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Solution

The fourth proportional to 5,275.20, 7,279.55 and 2,885.11 is: 3,981.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,275.20 : 7,279.55 = 2,885.11 : x
  2. Step 2: Convert to fraction form
    5,275.20/7,279.55 = 2,885.11/x
  3. Step 3: Cross multiply
    5,275.20x = 7,279.55 × 2,885.11
  4. Step 4: Simplify right side
    5,275.20x = 21,002,302.50
  5. Step 5: Solve for x
    x = 21,002,302.50/5,275.20
  6. Step 6: Final answer
    x = 3,981.33

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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.