Home / 13,708.12-18,915.17-7,739.66

Finding the Fourth Proportional to 13,708.12, 18,915.17 and 7,739.66

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Solution

The fourth proportional to 13,708.12, 18,915.17 and 7,739.66 is: 10,679.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,708.12 : 18,915.17 = 7,739.66 : x
  2. Step 2: Convert to fraction form
    13,708.12/18,915.17 = 7,739.66/x
  3. Step 3: Cross multiply
    13,708.12x = 18,915.17 × 7,739.66
  4. Step 4: Simplify right side
    13,708.12x = 146,396,851.37
  5. Step 5: Solve for x
    x = 146,396,851.37/13,708.12
  6. Step 6: Final answer
    x = 10,679.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.