Home / 5,310.80-7,955.40-2,715.20

Finding the Fourth Proportional to 5,310.80, 7,955.40 and 2,715.20

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Solution

The fourth proportional to 5,310.80, 7,955.40 and 2,715.20 is: 4,067.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,310.80 : 7,955.40 = 2,715.20 : x
  2. Step 2: Convert to fraction form
    5,310.80/7,955.40 = 2,715.20/x
  3. Step 3: Cross multiply
    5,310.80x = 7,955.40 × 2,715.20
  4. Step 4: Simplify right side
    5,310.80x = 21,600,502.08
  5. Step 5: Solve for x
    x = 21,600,502.08/5,310.80
  6. Step 6: Final answer
    x = 4,067.28

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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.