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Finding the Fourth Proportional to 15,079.16, 22,611.44 and 5,215

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Solution

The fourth proportional to 15,079.16, 22,611.44 and 5,215 is: 7,819.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,079.16 : 22,611.44 = 5,215 : x
  2. Step 2: Convert to fraction form
    15,079.16/22,611.44 = 5,215/x
  3. Step 3: Cross multiply
    15,079.16x = 22,611.44 × 5,215
  4. Step 4: Simplify right side
    15,079.16x = 117,918,659.60
  5. Step 5: Solve for x
    x = 117,918,659.60/15,079.16
  6. Step 6: Final answer
    x = 7,819.98

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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.