Home / 2,910.72-4,016.16-2,125.20

Finding the Fourth Proportional to 2,910.72, 4,016.16 and 2,125.20

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Solution

The fourth proportional to 2,910.72, 4,016.16 and 2,125.20 is: 2,932.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,910.72 : 4,016.16 = 2,125.20 : x
  2. Step 2: Convert to fraction form
    2,910.72/4,016.16 = 2,125.20/x
  3. Step 3: Cross multiply
    2,910.72x = 4,016.16 × 2,125.20
  4. Step 4: Simplify right side
    2,910.72x = 8,535,143.23
  5. Step 5: Solve for x
    x = 8,535,143.23/2,910.72
  6. Step 6: Final answer
    x = 2,932.31

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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.