Home / 7,479.38-10,322.13-4,122.80

Finding the Fourth Proportional to 7,479.38, 10,322.13 and 4,122.80

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Solution

The fourth proportional to 7,479.38, 10,322.13 and 4,122.80 is: 5,689.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,479.38 : 10,322.13 = 4,122.80 : x
  2. Step 2: Convert to fraction form
    7,479.38/10,322.13 = 4,122.80/x
  3. Step 3: Cross multiply
    7,479.38x = 10,322.13 × 4,122.80
  4. Step 4: Simplify right side
    7,479.38x = 42,556,077.56
  5. Step 5: Solve for x
    x = 42,556,077.56/7,479.38
  6. Step 6: Final answer
    x = 5,689.79

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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.