Home / 12,247.90-18,288.66-11,915.75

Finding the Fourth Proportional to 12,247.90, 18,288.66 and 11,915.75

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Solution

The fourth proportional to 12,247.90, 18,288.66 and 11,915.75 is: 17,792.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,247.90 : 18,288.66 = 11,915.75 : x
  2. Step 2: Convert to fraction form
    12,247.90/18,288.66 = 11,915.75/x
  3. Step 3: Cross multiply
    12,247.90x = 18,288.66 × 11,915.75
  4. Step 4: Simplify right side
    12,247.90x = 217,923,100.40
  5. Step 5: Solve for x
    x = 217,923,100.40/12,247.90
  6. Step 6: Final answer
    x = 17,792.69

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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.