Home / 7,965.85-11,920.80-6,543.71

Finding the Fourth Proportional to 7,965.85, 11,920.80 and 6,543.71

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Solution

The fourth proportional to 7,965.85, 11,920.80 and 6,543.71 is: 9,792.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,965.85 : 11,920.80 = 6,543.71 : x
  2. Step 2: Convert to fraction form
    7,965.85/11,920.80 = 6,543.71/x
  3. Step 3: Cross multiply
    7,965.85x = 11,920.80 × 6,543.71
  4. Step 4: Simplify right side
    7,965.85x = 78,006,258.17
  5. Step 5: Solve for x
    x = 78,006,258.17/7,965.85
  6. Step 6: Final answer
    x = 9,792.59

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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.