Home / 2,011.38-3,018.35-857.13

Finding the Fourth Proportional to 2,011.38, 3,018.35 and 857.13

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Solution

The fourth proportional to 2,011.38, 3,018.35 and 857.13 is: 1,286.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,011.38 : 3,018.35 = 857.13 : x
  2. Step 2: Convert to fraction form
    2,011.38/3,018.35 = 857.13/x
  3. Step 3: Cross multiply
    2,011.38x = 3,018.35 × 857.13
  4. Step 4: Simplify right side
    2,011.38x = 2,587,118.34
  5. Step 5: Solve for x
    x = 2,587,118.34/2,011.38
  6. Step 6: Final answer
    x = 1,286.24

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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.