Home / 5,279.40-7,931.34-3,311.08

Finding the Fourth Proportional to 5,279.40, 7,931.34 and 3,311.08

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Solution

The fourth proportional to 5,279.40, 7,931.34 and 3,311.08 is: 4,974.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,279.40 : 7,931.34 = 3,311.08 : x
  2. Step 2: Convert to fraction form
    5,279.40/7,931.34 = 3,311.08/x
  3. Step 3: Cross multiply
    5,279.40x = 7,931.34 × 3,311.08
  4. Step 4: Simplify right side
    5,279.40x = 26,261,301.25
  5. Step 5: Solve for x
    x = 26,261,301.25/5,279.40
  6. Step 6: Final answer
    x = 4,974.30

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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.