Home / 7,176.20-9,903.12-3,989.48

Finding the Fourth Proportional to 7,176.20, 9,903.12 and 3,989.48

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Solution

The fourth proportional to 7,176.20, 9,903.12 and 3,989.48 is: 5,505.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,176.20 : 9,903.12 = 3,989.48 : x
  2. Step 2: Convert to fraction form
    7,176.20/9,903.12 = 3,989.48/x
  3. Step 3: Cross multiply
    7,176.20x = 9,903.12 × 3,989.48
  4. Step 4: Simplify right side
    7,176.20x = 39,508,299.18
  5. Step 5: Solve for x
    x = 39,508,299.18/7,176.20
  6. Step 6: Final answer
    x = 5,505.46

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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.