Home / 5,639.18-7,781.31-3,279.50

Finding the Fourth Proportional to 5,639.18, 7,781.31 and 3,279.50

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Solution

The fourth proportional to 5,639.18, 7,781.31 and 3,279.50 is: 4,525.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,639.18 : 7,781.31 = 3,279.50 : x
  2. Step 2: Convert to fraction form
    5,639.18/7,781.31 = 3,279.50/x
  3. Step 3: Cross multiply
    5,639.18x = 7,781.31 × 3,279.50
  4. Step 4: Simplify right side
    5,639.18x = 25,518,806.15
  5. Step 5: Solve for x
    x = 25,518,806.15/5,639.18
  6. Step 6: Final answer
    x = 4,525.27

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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.