Home / 7,142.10-10,712.98-1,947.97

Finding the Fourth Proportional to 7,142.10, 10,712.98 and 1,947.97

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Solution

The fourth proportional to 7,142.10, 10,712.98 and 1,947.97 is: 2,921.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,142.10 : 10,712.98 = 1,947.97 : x
  2. Step 2: Convert to fraction form
    7,142.10/10,712.98 = 1,947.97/x
  3. Step 3: Cross multiply
    7,142.10x = 10,712.98 × 1,947.97
  4. Step 4: Simplify right side
    7,142.10x = 20,868,563.65
  5. Step 5: Solve for x
    x = 20,868,563.65/7,142.10
  6. Step 6: Final answer
    x = 2,921.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.