Home / 7,920.25-11,875.96-3,243.53

Finding the Fourth Proportional to 7,920.25, 11,875.96 and 3,243.53

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Solution

The fourth proportional to 7,920.25, 11,875.96 and 3,243.53 is: 4,863.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.25 : 11,875.96 = 3,243.53 : x
  2. Step 2: Convert to fraction form
    7,920.25/11,875.96 = 3,243.53/x
  3. Step 3: Cross multiply
    7,920.25x = 11,875.96 × 3,243.53
  4. Step 4: Simplify right side
    7,920.25x = 38,520,032.54
  5. Step 5: Solve for x
    x = 38,520,032.54/7,920.25
  6. Step 6: Final answer
    x = 4,863.49

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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.