Home / 7,309.92-10,085.28-4,122.72

Finding the Fourth Proportional to 7,309.92, 10,085.28 and 4,122.72

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Solution

The fourth proportional to 7,309.92, 10,085.28 and 4,122.72 is: 5,687.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,309.92 : 10,085.28 = 4,122.72 : x
  2. Step 2: Convert to fraction form
    7,309.92/10,085.28 = 4,122.72/x
  3. Step 3: Cross multiply
    7,309.92x = 10,085.28 × 4,122.72
  4. Step 4: Simplify right side
    7,309.92x = 41,578,785.56
  5. Step 5: Solve for x
    x = 41,578,785.56/7,309.92
  6. Step 6: Final answer
    x = 5,687.99

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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.