Home / 7,115.04-9,819.24-3,971.16

Finding the Fourth Proportional to 7,115.04, 9,819.24 and 3,971.16

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Solution

The fourth proportional to 7,115.04, 9,819.24 and 3,971.16 is: 5,480.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,115.04 : 9,819.24 = 3,971.16 : x
  2. Step 2: Convert to fraction form
    7,115.04/9,819.24 = 3,971.16/x
  3. Step 3: Cross multiply
    7,115.04x = 9,819.24 × 3,971.16
  4. Step 4: Simplify right side
    7,115.04x = 38,993,773.12
  5. Step 5: Solve for x
    x = 38,993,773.12/7,115.04
  6. Step 6: Final answer
    x = 5,480.47

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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.