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Finding the Fourth Proportional to 28,651.52, 39,531.02 and 18,580.38

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Solution

The fourth proportional to 28,651.52, 39,531.02 and 18,580.38 is: 25,635.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,651.52 : 39,531.02 = 18,580.38 : x
  2. Step 2: Convert to fraction form
    28,651.52/39,531.02 = 18,580.38/x
  3. Step 3: Cross multiply
    28,651.52x = 39,531.02 × 18,580.38
  4. Step 4: Simplify right side
    28,651.52x = 734,501,280.49
  5. Step 5: Solve for x
    x = 734,501,280.49/28,651.52
  6. Step 6: Final answer
    x = 25,635.69

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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.