Home / 7,479.05-10,321.16-4,121.87

Finding the Fourth Proportional to 7,479.05, 10,321.16 and 4,121.87

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Solution

The fourth proportional to 7,479.05, 10,321.16 and 4,121.87 is: 5,688.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,479.05 : 10,321.16 = 4,121.87 : x
  2. Step 2: Convert to fraction form
    7,479.05/10,321.16 = 4,121.87/x
  3. Step 3: Cross multiply
    7,479.05x = 10,321.16 × 4,121.87
  4. Step 4: Simplify right side
    7,479.05x = 42,542,407.55
  5. Step 5: Solve for x
    x = 42,542,407.55/7,479.05
  6. Step 6: Final answer
    x = 5,688.21

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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.