Home / 5,120.16-7,065.96-2,882.12

Finding the Fourth Proportional to 5,120.16, 7,065.96 and 2,882.12

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Solution

The fourth proportional to 5,120.16, 7,065.96 and 2,882.12 is: 3,977.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.16 : 7,065.96 = 2,882.12 : x
  2. Step 2: Convert to fraction form
    5,120.16/7,065.96 = 2,882.12/x
  3. Step 3: Cross multiply
    5,120.16x = 7,065.96 × 2,882.12
  4. Step 4: Simplify right side
    5,120.16x = 20,364,944.64
  5. Step 5: Solve for x
    x = 20,364,944.64/5,120.16
  6. Step 6: Final answer
    x = 3,977.40

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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.