Home / 7,191.72-10,785.45-2,808.12

Finding the Fourth Proportional to 7,191.72, 10,785.45 and 2,808.12

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Solution

The fourth proportional to 7,191.72, 10,785.45 and 2,808.12 is: 4,211.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,191.72 : 10,785.45 = 2,808.12 : x
  2. Step 2: Convert to fraction form
    7,191.72/10,785.45 = 2,808.12/x
  3. Step 3: Cross multiply
    7,191.72x = 10,785.45 × 2,808.12
  4. Step 4: Simplify right side
    7,191.72x = 30,286,837.85
  5. Step 5: Solve for x
    x = 30,286,837.85/7,191.72
  6. Step 6: Final answer
    x = 4,211.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.