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Finding the Fourth Proportional to 42,481.54, 63,718.17 and 12,899.63

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Solution

The fourth proportional to 42,481.54, 63,718.17 and 12,899.63 is: 19,348.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,481.54 : 63,718.17 = 12,899.63 : x
  2. Step 2: Convert to fraction form
    42,481.54/63,718.17 = 12,899.63/x
  3. Step 3: Cross multiply
    42,481.54x = 63,718.17 × 12,899.63
  4. Step 4: Simplify right side
    42,481.54x = 821,940,817.28
  5. Step 5: Solve for x
    x = 821,940,817.28/42,481.54
  6. Step 6: Final answer
    x = 19,348.19

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1.5x scale

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.