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Finding the Fourth Proportional to 28,576.88, 42,691.51 and 18,499.52

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Solution

The fourth proportional to 28,576.88, 42,691.51 and 18,499.52 is: 27,636.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,576.88 : 42,691.51 = 18,499.52 : x
  2. Step 2: Convert to fraction form
    28,576.88/42,691.51 = 18,499.52/x
  3. Step 3: Cross multiply
    28,576.88x = 42,691.51 × 18,499.52
  4. Step 4: Simplify right side
    28,576.88x = 789,772,443.08
  5. Step 5: Solve for x
    x = 789,772,443.08/28,576.88
  6. Step 6: Final answer
    x = 27,636.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.