Home / 5,261.20-7,891.80-4,479.40

Finding the Fourth Proportional to 5,261.20, 7,891.80 and 4,479.40

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Solution

The fourth proportional to 5,261.20, 7,891.80 and 4,479.40 is: 6,719.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,261.20 : 7,891.80 = 4,479.40 : x
  2. Step 2: Convert to fraction form
    5,261.20/7,891.80 = 4,479.40/x
  3. Step 3: Cross multiply
    5,261.20x = 7,891.80 × 4,479.40
  4. Step 4: Simplify right side
    5,261.20x = 35,350,528.92
  5. Step 5: Solve for x
    x = 35,350,528.92/5,261.20
  6. Step 6: Final answer
    x = 6,719.10

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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.