Home / 3,187.28-4,398.10-1,911.09

Finding the Fourth Proportional to 3,187.28, 4,398.10 and 1,911.09

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Solution

The fourth proportional to 3,187.28, 4,398.10 and 1,911.09 is: 2,637.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.28 : 4,398.10 = 1,911.09 : x
  2. Step 2: Convert to fraction form
    3,187.28/4,398.10 = 1,911.09/x
  3. Step 3: Cross multiply
    3,187.28x = 4,398.10 × 1,911.09
  4. Step 4: Simplify right side
    3,187.28x = 8,405,176.64
  5. Step 5: Solve for x
    x = 8,405,176.64/3,187.28
  6. Step 6: Final answer
    x = 2,637.10

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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.