Home / 12,247.40-18,287.92-11,915.25

Finding the Fourth Proportional to 12,247.40, 18,287.92 and 11,915.25

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Solution

The fourth proportional to 12,247.40, 18,287.92 and 11,915.25 is: 17,791.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,247.40 : 18,287.92 = 11,915.25 : x
  2. Step 2: Convert to fraction form
    12,247.40/18,287.92 = 11,915.25/x
  3. Step 3: Cross multiply
    12,247.40x = 18,287.92 × 11,915.25
  4. Step 4: Simplify right side
    12,247.40x = 217,904,987.76
  5. Step 5: Solve for x
    x = 217,904,987.76/12,247.40
  6. Step 6: Final answer
    x = 17,791.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.