Home / 3,711.80-5,121.30-2,140.76

Finding the Fourth Proportional to 3,711.80, 5,121.30 and 2,140.76

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Solution

The fourth proportional to 3,711.80, 5,121.30 and 2,140.76 is: 2,953.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,711.80 : 5,121.30 = 2,140.76 : x
  2. Step 2: Convert to fraction form
    3,711.80/5,121.30 = 2,140.76/x
  3. Step 3: Cross multiply
    3,711.80x = 5,121.30 × 2,140.76
  4. Step 4: Simplify right side
    3,711.80x = 10,963,474.19
  5. Step 5: Solve for x
    x = 10,963,474.19/3,711.80
  6. Step 6: Final answer
    x = 2,953.68

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Double scale
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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.