Home / 12,217.89-16,860.87-7,182.21

Finding the Fourth Proportional to 12,217.89, 16,860.87 and 7,182.21

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Solution

The fourth proportional to 12,217.89, 16,860.87 and 7,182.21 is: 9,911.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,217.89 : 16,860.87 = 7,182.21 : x
  2. Step 2: Convert to fraction form
    12,217.89/16,860.87 = 7,182.21/x
  3. Step 3: Cross multiply
    12,217.89x = 16,860.87 × 7,182.21
  4. Step 4: Simplify right side
    12,217.89x = 121,098,309.12
  5. Step 5: Solve for x
    x = 121,098,309.12/12,217.89
  6. Step 6: Final answer
    x = 9,911.56

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Double scale
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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.