Home / 3,891.62-5,370.29-2,123.18

Finding the Fourth Proportional to 3,891.62, 5,370.29 and 2,123.18

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Solution

The fourth proportional to 3,891.62, 5,370.29 and 2,123.18 is: 2,929.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.62 : 5,370.29 = 2,123.18 : x
  2. Step 2: Convert to fraction form
    3,891.62/5,370.29 = 2,123.18/x
  3. Step 3: Cross multiply
    3,891.62x = 5,370.29 × 2,123.18
  4. Step 4: Simplify right side
    3,891.62x = 11,402,095.13
  5. Step 5: Solve for x
    x = 11,402,095.13/3,891.62
  6. Step 6: Final answer
    x = 2,929.91

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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.