Home / 5,281.55-7,288.30-2,891.48

Finding the Fourth Proportional to 5,281.55, 7,288.30 and 2,891.48

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Solution

The fourth proportional to 5,281.55, 7,288.30 and 2,891.48 is: 3,990.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,281.55 : 7,288.30 = 2,891.48 : x
  2. Step 2: Convert to fraction form
    5,281.55/7,288.30 = 2,891.48/x
  3. Step 3: Cross multiply
    5,281.55x = 7,288.30 × 2,891.48
  4. Step 4: Simplify right side
    5,281.55x = 21,073,973.68
  5. Step 5: Solve for x
    x = 21,073,973.68/5,281.55
  6. Step 6: Final answer
    x = 3,990.11

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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.