Home / 3,991.29-5,508.03-2,312.81

Finding the Fourth Proportional to 3,991.29, 5,508.03 and 2,312.81

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Solution

The fourth proportional to 3,991.29, 5,508.03 and 2,312.81 is: 3,191.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.29 : 5,508.03 = 2,312.81 : x
  2. Step 2: Convert to fraction form
    3,991.29/5,508.03 = 2,312.81/x
  3. Step 3: Cross multiply
    3,991.29x = 5,508.03 × 2,312.81
  4. Step 4: Simplify right side
    3,991.29x = 12,739,059.63
  5. Step 5: Solve for x
    x = 12,739,059.63/3,991.29
  6. Step 6: Final answer
    x = 3,191.72

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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.