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Finding the Fourth Proportional to 12,221.16, 16,862.40 and 6,914.82

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Solution

The fourth proportional to 12,221.16, 16,862.40 and 6,914.82 is: 9,540.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,221.16 : 16,862.40 = 6,914.82 : x
  2. Step 2: Convert to fraction form
    12,221.16/16,862.40 = 6,914.82/x
  3. Step 3: Cross multiply
    12,221.16x = 16,862.40 × 6,914.82
  4. Step 4: Simplify right side
    12,221.16x = 116,600,460.77
  5. Step 5: Solve for x
    x = 116,600,460.77/12,221.16
  6. Step 6: Final answer
    x = 9,540.87

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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.