Home / 5,275.13-7,912.85-1,379.57

Finding the Fourth Proportional to 5,275.13, 7,912.85 and 1,379.57

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Solution

The fourth proportional to 5,275.13, 7,912.85 and 1,379.57 is: 2,069.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,275.13 : 7,912.85 = 1,379.57 : x
  2. Step 2: Convert to fraction form
    5,275.13/7,912.85 = 1,379.57/x
  3. Step 3: Cross multiply
    5,275.13x = 7,912.85 × 1,379.57
  4. Step 4: Simplify right side
    5,275.13x = 10,916,284.01
  5. Step 5: Solve for x
    x = 10,916,284.01/5,275.13
  6. Step 6: Final answer
    x = 2,069.39

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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.