Home / 2,116.95-2,921.36-1,172.73

Finding the Fourth Proportional to 2,116.95, 2,921.36 and 1,172.73

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Solution

The fourth proportional to 2,116.95, 2,921.36 and 1,172.73 is: 1,618.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,116.95 : 2,921.36 = 1,172.73 : x
  2. Step 2: Convert to fraction form
    2,116.95/2,921.36 = 1,172.73/x
  3. Step 3: Cross multiply
    2,116.95x = 2,921.36 × 1,172.73
  4. Step 4: Simplify right side
    2,116.95x = 3,425,960.65
  5. Step 5: Solve for x
    x = 3,425,960.65/2,116.95
  6. Step 6: Final answer
    x = 1,618.35

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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.