Home / 2,181.20-3,011.76-1,342.30

Finding the Fourth Proportional to 2,181.20, 3,011.76 and 1,342.30

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Solution

The fourth proportional to 2,181.20, 3,011.76 and 1,342.30 is: 1,853.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.20 : 3,011.76 = 1,342.30 : x
  2. Step 2: Convert to fraction form
    2,181.20/3,011.76 = 1,342.30/x
  3. Step 3: Cross multiply
    2,181.20x = 3,011.76 × 1,342.30
  4. Step 4: Simplify right side
    2,181.20x = 4,042,685.45
  5. Step 5: Solve for x
    x = 4,042,685.45/2,181.20
  6. Step 6: Final answer
    x = 1,853.42

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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.