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Finding the Fourth Proportional to 12,223.91, 16,863.12 and 7,187.90

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Solution

The fourth proportional to 12,223.91, 16,863.12 and 7,187.90 is: 9,915.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,223.91 : 16,863.12 = 7,187.90 : x
  2. Step 2: Convert to fraction form
    12,223.91/16,863.12 = 7,187.90/x
  3. Step 3: Cross multiply
    12,223.91x = 16,863.12 × 7,187.90
  4. Step 4: Simplify right side
    12,223.91x = 121,210,335.93
  5. Step 5: Solve for x
    x = 121,210,335.93/12,223.91
  6. Step 6: Final answer
    x = 9,915.84

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1.5x scale

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.