Home / 7,479.85-10,322.26-4,122.78

Finding the Fourth Proportional to 7,479.85, 10,322.26 and 4,122.78

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Solution

The fourth proportional to 7,479.85, 10,322.26 and 4,122.78 is: 5,689.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,479.85 : 10,322.26 = 4,122.78 : x
  2. Step 2: Convert to fraction form
    7,479.85/10,322.26 = 4,122.78/x
  3. Step 3: Cross multiply
    7,479.85x = 10,322.26 × 4,122.78
  4. Step 4: Simplify right side
    7,479.85x = 42,556,407.08
  5. Step 5: Solve for x
    x = 42,556,407.08/7,479.85
  6. Step 6: Final answer
    x = 5,689.47

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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.