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Finding the Fourth Proportional to 28,648.98, 42,947.49 and 15,485.97

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Solution

The fourth proportional to 28,648.98, 42,947.49 and 15,485.97 is: 23,214.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,648.98 : 42,947.49 = 15,485.97 : x
  2. Step 2: Convert to fraction form
    28,648.98/42,947.49 = 15,485.97/x
  3. Step 3: Cross multiply
    28,648.98x = 42,947.49 × 15,485.97
  4. Step 4: Simplify right side
    28,648.98x = 665,083,541.72
  5. Step 5: Solve for x
    x = 665,083,541.72/28,648.98
  6. Step 6: Final answer
    x = 23,214.91

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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.