Home / 2,156.20-2,975.56-1,211.96

Finding the Fourth Proportional to 2,156.20, 2,975.56 and 1,211.96

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Solution

The fourth proportional to 2,156.20, 2,975.56 and 1,211.96 is: 1,672.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.20 : 2,975.56 = 1,211.96 : x
  2. Step 2: Convert to fraction form
    2,156.20/2,975.56 = 1,211.96/x
  3. Step 3: Cross multiply
    2,156.20x = 2,975.56 × 1,211.96
  4. Step 4: Simplify right side
    2,156.20x = 3,606,259.70
  5. Step 5: Solve for x
    x = 3,606,259.70/2,156.20
  6. Step 6: Final answer
    x = 1,672.51

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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.