Home / 7,115.53-9,819.44-3,971.72

Finding the Fourth Proportional to 7,115.53, 9,819.44 and 3,971.72

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Solution

The fourth proportional to 7,115.53, 9,819.44 and 3,971.72 is: 5,480.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,115.53 : 9,819.44 = 3,971.72 : x
  2. Step 2: Convert to fraction form
    7,115.53/9,819.44 = 3,971.72/x
  3. Step 3: Cross multiply
    7,115.53x = 9,819.44 × 3,971.72
  4. Step 4: Simplify right side
    7,115.53x = 39,000,066.24
  5. Step 5: Solve for x
    x = 39,000,066.24/7,115.53
  6. Step 6: Final answer
    x = 5,480.98

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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.