Home / 2,981.97-4,113.25-1,921.11

Finding the Fourth Proportional to 2,981.97, 4,113.25 and 1,921.11

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Solution

The fourth proportional to 2,981.97, 4,113.25 and 1,921.11 is: 2,649.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,981.97 : 4,113.25 = 1,921.11 : x
  2. Step 2: Convert to fraction form
    2,981.97/4,113.25 = 1,921.11/x
  3. Step 3: Cross multiply
    2,981.97x = 4,113.25 × 1,921.11
  4. Step 4: Simplify right side
    2,981.97x = 7,902,005.71
  5. Step 5: Solve for x
    x = 7,902,005.71/2,981.97
  6. Step 6: Final answer
    x = 2,649.93

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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.