Home / 12,885.08-17,781.50-7,220.04

Finding the Fourth Proportional to 12,885.08, 17,781.50 and 7,220.04

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Solution

The fourth proportional to 12,885.08, 17,781.50 and 7,220.04 is: 9,963.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,885.08 : 17,781.50 = 7,220.04 : x
  2. Step 2: Convert to fraction form
    12,885.08/17,781.50 = 7,220.04/x
  3. Step 3: Cross multiply
    12,885.08x = 17,781.50 × 7,220.04
  4. Step 4: Simplify right side
    12,885.08x = 128,383,141.26
  5. Step 5: Solve for x
    x = 128,383,141.26/12,885.08
  6. Step 6: Final answer
    x = 9,963.71

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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.