Home / 3,991.08-5,510.66-2,421.30

Finding the Fourth Proportional to 3,991.08, 5,510.66 and 2,421.30

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Solution

The fourth proportional to 3,991.08, 5,510.66 and 2,421.30 is: 3,343.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.08 : 5,510.66 = 2,421.30 : x
  2. Step 2: Convert to fraction form
    3,991.08/5,510.66 = 2,421.30/x
  3. Step 3: Cross multiply
    3,991.08x = 5,510.66 × 2,421.30
  4. Step 4: Simplify right side
    3,991.08x = 13,342,961.06
  5. Step 5: Solve for x
    x = 13,342,961.06/3,991.08
  6. Step 6: Final answer
    x = 3,343.20

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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.