Home / 5,705.30-7,872.81-3,187.07

Finding the Fourth Proportional to 5,705.30, 7,872.81 and 3,187.07

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Solution

The fourth proportional to 5,705.30, 7,872.81 and 3,187.07 is: 4,397.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,705.30 : 7,872.81 = 3,187.07 : x
  2. Step 2: Convert to fraction form
    5,705.30/7,872.81 = 3,187.07/x
  3. Step 3: Cross multiply
    5,705.30x = 7,872.81 × 3,187.07
  4. Step 4: Simplify right side
    5,705.30x = 25,091,196.57
  5. Step 5: Solve for x
    x = 25,091,196.57/5,705.30
  6. Step 6: Final answer
    x = 4,397.88

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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.