Home / 12,489.89-17,236.14-8,013.72

Finding the Fourth Proportional to 12,489.89, 17,236.14 and 8,013.72

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Solution

The fourth proportional to 12,489.89, 17,236.14 and 8,013.72 is: 11,059.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.89 : 17,236.14 = 8,013.72 : x
  2. Step 2: Convert to fraction form
    12,489.89/17,236.14 = 8,013.72/x
  3. Step 3: Cross multiply
    12,489.89x = 17,236.14 × 8,013.72
  4. Step 4: Simplify right side
    12,489.89x = 138,125,599.84
  5. Step 5: Solve for x
    x = 138,125,599.84/12,489.89
  6. Step 6: Final answer
    x = 11,059.00

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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.