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Finding the Fourth Proportional to 42,193.80, 63,280.98 and 12,610.98

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Solution

The fourth proportional to 42,193.80, 63,280.98 and 12,610.98 is: 18,913.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,193.80 : 63,280.98 = 12,610.98 : x
  2. Step 2: Convert to fraction form
    42,193.80/63,280.98 = 12,610.98/x
  3. Step 3: Cross multiply
    42,193.80x = 63,280.98 × 12,610.98
  4. Step 4: Simplify right side
    42,193.80x = 798,035,173.16
  5. Step 5: Solve for x
    x = 798,035,173.16/42,193.80
  6. Step 6: Final answer
    x = 18,913.56

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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.