Home / 3,181.92-4,392.80-2,139.52

Finding the Fourth Proportional to 3,181.92, 4,392.80 and 2,139.52

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Solution

The fourth proportional to 3,181.92, 4,392.80 and 2,139.52 is: 2,953.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,181.92 : 4,392.80 = 2,139.52 : x
  2. Step 2: Convert to fraction form
    3,181.92/4,392.80 = 2,139.52/x
  3. Step 3: Cross multiply
    3,181.92x = 4,392.80 × 2,139.52
  4. Step 4: Simplify right side
    3,181.92x = 9,398,483.46
  5. Step 5: Solve for x
    x = 9,398,483.46/3,181.92
  6. Step 6: Final answer
    x = 2,953.71

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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.