Home / 5,276.80-7,902.40-3,971.20

Finding the Fourth Proportional to 5,276.80, 7,902.40 and 3,971.20

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Solution

The fourth proportional to 5,276.80, 7,902.40 and 3,971.20 is: 5,947.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,276.80 : 7,902.40 = 3,971.20 : x
  2. Step 2: Convert to fraction form
    5,276.80/7,902.40 = 3,971.20/x
  3. Step 3: Cross multiply
    5,276.80x = 7,902.40 × 3,971.20
  4. Step 4: Simplify right side
    5,276.80x = 31,382,010.88
  5. Step 5: Solve for x
    x = 31,382,010.88/5,276.80
  6. Step 6: Final answer
    x = 5,947.17

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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.