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Finding the Fourth Proportional to 15,144.65, 20,885.12 and 11,553.23

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Solution

The fourth proportional to 15,144.65, 20,885.12 and 11,553.23 is: 15,932.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,144.65 : 20,885.12 = 11,553.23 : x
  2. Step 2: Convert to fraction form
    15,144.65/20,885.12 = 11,553.23/x
  3. Step 3: Cross multiply
    15,144.65x = 20,885.12 × 11,553.23
  4. Step 4: Simplify right side
    15,144.65x = 241,290,432.75
  5. Step 5: Solve for x
    x = 241,290,432.75/15,144.65
  6. Step 6: Final answer
    x = 15,932.39

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Half scale
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Double scale
Find fourth proportional to 15,145.65, 20,886.49 and 11,554.23
Similar ratio
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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.