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Finding the Fourth Proportional to 15,019.78, 22,530.84 and 4,489

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Solution

The fourth proportional to 15,019.78, 22,530.84 and 4,489 is: 6,733.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,019.78 : 22,530.84 = 4,489 : x
  2. Step 2: Convert to fraction form
    15,019.78/22,530.84 = 4,489/x
  3. Step 3: Cross multiply
    15,019.78x = 22,530.84 × 4,489
  4. Step 4: Simplify right side
    15,019.78x = 101,140,940.76
  5. Step 5: Solve for x
    x = 101,140,940.76/15,019.78
  6. Step 6: Final answer
    x = 6,733.85

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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.