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Finding the Fourth Proportional to 42,413.78, 63,620.70 and 14,711.78

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Solution

The fourth proportional to 42,413.78, 63,620.70 and 14,711.78 is: 22,067.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,413.78 : 63,620.70 = 14,711.78 : x
  2. Step 2: Convert to fraction form
    42,413.78/63,620.70 = 14,711.78/x
  3. Step 3: Cross multiply
    42,413.78x = 63,620.70 × 14,711.78
  4. Step 4: Simplify right side
    42,413.78x = 935,973,741.85
  5. Step 5: Solve for x
    x = 935,973,741.85/42,413.78
  6. Step 6: Final answer
    x = 22,067.68

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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.