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Finding the Fourth Proportional to 15,999.90, 23,999.85 and 5,611.65

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Solution

The fourth proportional to 15,999.90, 23,999.85 and 5,611.65 is: 8,417.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,999.90 : 23,999.85 = 5,611.65 : x
  2. Step 2: Convert to fraction form
    15,999.90/23,999.85 = 5,611.65/x
  3. Step 3: Cross multiply
    15,999.90x = 23,999.85 × 5,611.65
  4. Step 4: Simplify right side
    15,999.90x = 134,678,758.25
  5. Step 5: Solve for x
    x = 134,678,758.25/15,999.90
  6. Step 6: Final answer
    x = 8,417.48

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.