Home / 9,979.68-13,777.88-8,872.60

Finding the Fourth Proportional to 9,979.68, 13,777.88 and 8,872.60

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Solution

The fourth proportional to 9,979.68, 13,777.88 and 8,872.60 is: 12,249.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,979.68 : 13,777.88 = 8,872.60 : x
  2. Step 2: Convert to fraction form
    9,979.68/13,777.88 = 8,872.60/x
  3. Step 3: Cross multiply
    9,979.68x = 13,777.88 × 8,872.60
  4. Step 4: Simplify right side
    9,979.68x = 122,245,618.09
  5. Step 5: Solve for x
    x = 122,245,618.09/9,979.68
  6. Step 6: Final answer
    x = 12,249.45

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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.