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Finding the Fourth Proportional to 15,129.67, 20,869.25 and 9,758.96

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Solution

The fourth proportional to 15,129.67, 20,869.25 and 9,758.96 is: 13,461.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,129.67 : 20,869.25 = 9,758.96 : x
  2. Step 2: Convert to fraction form
    15,129.67/20,869.25 = 9,758.96/x
  3. Step 3: Cross multiply
    15,129.67x = 20,869.25 × 9,758.96
  4. Step 4: Simplify right side
    15,129.67x = 203,662,218.49
  5. Step 5: Solve for x
    x = 203,662,218.49/15,129.67
  6. Step 6: Final answer
    x = 13,461.11

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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.