Home / 12,219.88-16,863.40-6,915.12

Finding the Fourth Proportional to 12,219.88, 16,863.40 and 6,915.12

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Solution

The fourth proportional to 12,219.88, 16,863.40 and 6,915.12 is: 9,542.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,219.88 : 16,863.40 = 6,915.12 : x
  2. Step 2: Convert to fraction form
    12,219.88/16,863.40 = 6,915.12/x
  3. Step 3: Cross multiply
    12,219.88x = 16,863.40 × 6,915.12
  4. Step 4: Simplify right side
    12,219.88x = 116,612,434.61
  5. Step 5: Solve for x
    x = 116,612,434.61/12,219.88
  6. Step 6: Final answer
    x = 9,542.85

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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.