Home / 3,865.67-5,335.40-2,187.11

Finding the Fourth Proportional to 3,865.67, 5,335.40 and 2,187.11

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Solution

The fourth proportional to 3,865.67, 5,335.40 and 2,187.11 is: 3,018.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,865.67 : 5,335.40 = 2,187.11 : x
  2. Step 2: Convert to fraction form
    3,865.67/5,335.40 = 2,187.11/x
  3. Step 3: Cross multiply
    3,865.67x = 5,335.40 × 2,187.11
  4. Step 4: Simplify right side
    3,865.67x = 11,669,106.69
  5. Step 5: Solve for x
    x = 11,669,106.69/3,865.67
  6. Step 6: Final answer
    x = 3,018.65

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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.