Home / 7,176.96-9,903.18-3,990.06

Finding the Fourth Proportional to 7,176.96, 9,903.18 and 3,990.06

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Solution

The fourth proportional to 7,176.96, 9,903.18 and 3,990.06 is: 5,505.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,176.96 : 9,903.18 = 3,990.06 : x
  2. Step 2: Convert to fraction form
    7,176.96/9,903.18 = 3,990.06/x
  3. Step 3: Cross multiply
    7,176.96x = 9,903.18 × 3,990.06
  4. Step 4: Simplify right side
    7,176.96x = 39,514,282.39
  5. Step 5: Solve for x
    x = 39,514,282.39/7,176.96
  6. Step 6: Final answer
    x = 5,505.71

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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.