Home / 1,947.12-2,686.68-1,107.69

Finding the Fourth Proportional to 1,947.12, 2,686.68 and 1,107.69

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Solution

The fourth proportional to 1,947.12, 2,686.68 and 1,107.69 is: 1,528.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.12 : 2,686.68 = 1,107.69 : x
  2. Step 2: Convert to fraction form
    1,947.12/2,686.68 = 1,107.69/x
  3. Step 3: Cross multiply
    1,947.12x = 2,686.68 × 1,107.69
  4. Step 4: Simplify right side
    1,947.12x = 2,976,008.57
  5. Step 5: Solve for x
    x = 2,976,008.57/1,947.12
  6. Step 6: Final answer
    x = 1,528.42

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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.