Home / 7,865.12-11,781.28-3,708.64

Finding the Fourth Proportional to 7,865.12, 11,781.28 and 3,708.64

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Solution

The fourth proportional to 7,865.12, 11,781.28 and 3,708.64 is: 5,555.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,865.12 : 11,781.28 = 3,708.64 : x
  2. Step 2: Convert to fraction form
    7,865.12/11,781.28 = 3,708.64/x
  3. Step 3: Cross multiply
    7,865.12x = 11,781.28 × 3,708.64
  4. Step 4: Simplify right side
    7,865.12x = 43,692,526.26
  5. Step 5: Solve for x
    x = 43,692,526.26/7,865.12
  6. Step 6: Final answer
    x = 5,555.23

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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.