Home / 7,781.32-11,665.68-5,309.92

Finding the Fourth Proportional to 7,781.32, 11,665.68 and 5,309.92

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Solution

The fourth proportional to 7,781.32, 11,665.68 and 5,309.92 is: 7,960.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,781.32 : 11,665.68 = 5,309.92 : x
  2. Step 2: Convert to fraction form
    7,781.32/11,665.68 = 5,309.92/x
  3. Step 3: Cross multiply
    7,781.32x = 11,665.68 × 5,309.92
  4. Step 4: Simplify right side
    7,781.32x = 61,943,827.55
  5. Step 5: Solve for x
    x = 61,943,827.55/7,781.32
  6. Step 6: Final answer
    x = 7,960.58

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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.