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Finding the Fourth Proportional to 10,872.93, 14,996.88 and 9,979.57

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Solution

The fourth proportional to 10,872.93, 14,996.88 and 9,979.57 is: 13,764.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,872.93 : 14,996.88 = 9,979.57 : x
  2. Step 2: Convert to fraction form
    10,872.93/14,996.88 = 9,979.57/x
  3. Step 3: Cross multiply
    10,872.93x = 14,996.88 × 9,979.57
  4. Step 4: Simplify right side
    10,872.93x = 149,662,413.74
  5. Step 5: Solve for x
    x = 149,662,413.74/10,872.93
  6. Step 6: Final answer
    x = 13,764.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.