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Finding the Fourth Proportional to 42,608.76, 63,913.31 and 13,026.54

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Solution

The fourth proportional to 42,608.76, 63,913.31 and 13,026.54 is: 19,539.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,608.76 : 63,913.31 = 13,026.54 : x
  2. Step 2: Convert to fraction form
    42,608.76/63,913.31 = 13,026.54/x
  3. Step 3: Cross multiply
    42,608.76x = 63,913.31 × 13,026.54
  4. Step 4: Simplify right side
    42,608.76x = 832,569,512.64
  5. Step 5: Solve for x
    x = 832,569,512.64/42,608.76
  6. Step 6: Final answer
    x = 19,539.87

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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.