Home / 3,869.40-5,340.16-2,191.08

Finding the Fourth Proportional to 3,869.40, 5,340.16 and 2,191.08

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Solution

The fourth proportional to 3,869.40, 5,340.16 and 2,191.08 is: 3,023.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,869.40 : 5,340.16 = 2,191.08 : x
  2. Step 2: Convert to fraction form
    3,869.40/5,340.16 = 2,191.08/x
  3. Step 3: Cross multiply
    3,869.40x = 5,340.16 × 2,191.08
  4. Step 4: Simplify right side
    3,869.40x = 11,700,717.77
  5. Step 5: Solve for x
    x = 11,700,717.77/3,869.40
  6. Step 6: Final answer
    x = 3,023.91

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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.