Home / 5,705.11-7,872.28-3,186.91

Finding the Fourth Proportional to 5,705.11, 7,872.28 and 3,186.91

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Solution

The fourth proportional to 5,705.11, 7,872.28 and 3,186.91 is: 4,397.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,705.11 : 7,872.28 = 3,186.91 : x
  2. Step 2: Convert to fraction form
    5,705.11/7,872.28 = 3,186.91/x
  3. Step 3: Cross multiply
    5,705.11x = 7,872.28 × 3,186.91
  4. Step 4: Simplify right side
    5,705.11x = 25,088,245.25
  5. Step 5: Solve for x
    x = 25,088,245.25/5,705.11
  6. Step 6: Final answer
    x = 4,397.50

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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.