Home / 2,891.54-4,321.45-2,113.18

Finding the Fourth Proportional to 2,891.54, 4,321.45 and 2,113.18

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Solution

The fourth proportional to 2,891.54, 4,321.45 and 2,113.18 is: 3,158.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,891.54 : 4,321.45 = 2,113.18 : x
  2. Step 2: Convert to fraction form
    2,891.54/4,321.45 = 2,113.18/x
  3. Step 3: Cross multiply
    2,891.54x = 4,321.45 × 2,113.18
  4. Step 4: Simplify right side
    2,891.54x = 9,132,001.71
  5. Step 5: Solve for x
    x = 9,132,001.71/2,891.54
  6. Step 6: Final answer
    x = 3,158.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.