Home / 3,991.53-5,508.05-2,312.80

Finding the Fourth Proportional to 3,991.53, 5,508.05 and 2,312.80

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Solution

The fourth proportional to 3,991.53, 5,508.05 and 2,312.80 is: 3,191.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.53 : 5,508.05 = 2,312.80 : x
  2. Step 2: Convert to fraction form
    3,991.53/5,508.05 = 2,312.80/x
  3. Step 3: Cross multiply
    3,991.53x = 5,508.05 × 2,312.80
  4. Step 4: Simplify right side
    3,991.53x = 12,739,018.04
  5. Step 5: Solve for x
    x = 12,739,018.04/3,991.53
  6. Step 6: Final answer
    x = 3,191.51

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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.