Home / 7,287.49-10,931.28-3,998.79

Finding the Fourth Proportional to 7,287.49, 10,931.28 and 3,998.79

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Solution

The fourth proportional to 7,287.49, 10,931.28 and 3,998.79 is: 5,998.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,287.49 : 10,931.28 = 3,998.79 : x
  2. Step 2: Convert to fraction form
    7,287.49/10,931.28 = 3,998.79/x
  3. Step 3: Cross multiply
    7,287.49x = 10,931.28 × 3,998.79
  4. Step 4: Simplify right side
    7,287.49x = 43,711,920.15
  5. Step 5: Solve for x
    x = 43,711,920.15/7,287.49
  6. Step 6: Final answer
    x = 5,998.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.