Home / 3,868.40-5,338.50-2,275.15

Finding the Fourth Proportional to 3,868.40, 5,338.50 and 2,275.15

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Solution

The fourth proportional to 3,868.40, 5,338.50 and 2,275.15 is: 3,139.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,868.40 : 5,338.50 = 2,275.15 : x
  2. Step 2: Convert to fraction form
    3,868.40/5,338.50 = 2,275.15/x
  3. Step 3: Cross multiply
    3,868.40x = 5,338.50 × 2,275.15
  4. Step 4: Simplify right side
    3,868.40x = 12,145,888.28
  5. Step 5: Solve for x
    x = 12,145,888.28/3,868.40
  6. Step 6: Final answer
    x = 3,139.77

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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.