Home / 2,187.09-3,017.76-1,291.11

Finding the Fourth Proportional to 2,187.09, 3,017.76 and 1,291.11

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Solution

The fourth proportional to 2,187.09, 3,017.76 and 1,291.11 is: 1,781.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.09 : 3,017.76 = 1,291.11 : x
  2. Step 2: Convert to fraction form
    2,187.09/3,017.76 = 1,291.11/x
  3. Step 3: Cross multiply
    2,187.09x = 3,017.76 × 1,291.11
  4. Step 4: Simplify right side
    2,187.09x = 3,896,260.11
  5. Step 5: Solve for x
    x = 3,896,260.11/2,187.09
  6. Step 6: Final answer
    x = 1,781.48

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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.