Home / 9,979.78-13,771.46-5,727.85

Finding the Fourth Proportional to 9,979.78, 13,771.46 and 5,727.85

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Solution

The fourth proportional to 9,979.78, 13,771.46 and 5,727.85 is: 7,904.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,979.78 : 13,771.46 = 5,727.85 : x
  2. Step 2: Convert to fraction form
    9,979.78/13,771.46 = 5,727.85/x
  3. Step 3: Cross multiply
    9,979.78x = 13,771.46 × 5,727.85
  4. Step 4: Simplify right side
    9,979.78x = 78,880,788.30
  5. Step 5: Solve for x
    x = 78,880,788.30/9,979.78
  6. Step 6: Final answer
    x = 7,904.06

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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.