Home / 5,378.09-7,422.26-3,139.52

Finding the Fourth Proportional to 5,378.09, 7,422.26 and 3,139.52

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Solution

The fourth proportional to 5,378.09, 7,422.26 and 3,139.52 is: 4,332.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,378.09 : 7,422.26 = 3,139.52 : x
  2. Step 2: Convert to fraction form
    5,378.09/7,422.26 = 3,139.52/x
  3. Step 3: Cross multiply
    5,378.09x = 7,422.26 × 3,139.52
  4. Step 4: Simplify right side
    5,378.09x = 23,302,280.91
  5. Step 5: Solve for x
    x = 23,302,280.91/5,378.09
  6. Step 6: Final answer
    x = 4,332.82

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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.