Home / 2,089.80-3,129.23-1,111.12

Finding the Fourth Proportional to 2,089.80, 3,129.23 and 1,111.12

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Solution

The fourth proportional to 2,089.80, 3,129.23 and 1,111.12 is: 1,663.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,089.80 : 3,129.23 = 1,111.12 : x
  2. Step 2: Convert to fraction form
    2,089.80/3,129.23 = 1,111.12/x
  3. Step 3: Cross multiply
    2,089.80x = 3,129.23 × 1,111.12
  4. Step 4: Simplify right side
    2,089.80x = 3,476,944.99
  5. Step 5: Solve for x
    x = 3,476,944.99/2,089.80
  6. Step 6: Final answer
    x = 1,663.77

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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.