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Finding the Fourth Proportional to 28,370.73, 42,562.94 and 8,648.08

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Solution

The fourth proportional to 28,370.73, 42,562.94 and 8,648.08 is: 12,974.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,370.73 : 42,562.94 = 8,648.08 : x
  2. Step 2: Convert to fraction form
    28,370.73/42,562.94 = 8,648.08/x
  3. Step 3: Cross multiply
    28,370.73x = 42,562.94 × 8,648.08
  4. Step 4: Simplify right side
    28,370.73x = 368,087,710.16
  5. Step 5: Solve for x
    x = 368,087,710.16/28,370.73
  6. Step 6: Final answer
    x = 12,974.21

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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.