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Finding the Fourth Proportional to 15,469.38, 21,347.44 and 8,754.89

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Solution

The fourth proportional to 15,469.38, 21,347.44 and 8,754.89 is: 12,081.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,469.38 : 21,347.44 = 8,754.89 : x
  2. Step 2: Convert to fraction form
    15,469.38/21,347.44 = 8,754.89/x
  3. Step 3: Cross multiply
    15,469.38x = 21,347.44 × 8,754.89
  4. Step 4: Simplify right side
    15,469.38x = 186,894,360.36
  5. Step 5: Solve for x
    x = 186,894,360.36/15,469.38
  6. Step 6: Final answer
    x = 12,081.57

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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.