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Finding the Fourth Proportional to 42,462.60, 63,694.05 and 12,880.68

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Solution

The fourth proportional to 42,462.60, 63,694.05 and 12,880.68 is: 19,321.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,462.60 : 63,694.05 = 12,880.68 : x
  2. Step 2: Convert to fraction form
    42,462.60/63,694.05 = 12,880.68/x
  3. Step 3: Cross multiply
    42,462.60x = 63,694.05 × 12,880.68
  4. Step 4: Simplify right side
    42,462.60x = 820,422,675.95
  5. Step 5: Solve for x
    x = 820,422,675.95/42,462.60
  6. Step 6: Final answer
    x = 19,321.07

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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.