Home / 2,787.12-4,180.14-1,909.08

Finding the Fourth Proportional to 2,787.12, 4,180.14 and 1,909.08

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Solution

The fourth proportional to 2,787.12, 4,180.14 and 1,909.08 is: 2,863.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.12 : 4,180.14 = 1,909.08 : x
  2. Step 2: Convert to fraction form
    2,787.12/4,180.14 = 1,909.08/x
  3. Step 3: Cross multiply
    2,787.12x = 4,180.14 × 1,909.08
  4. Step 4: Simplify right side
    2,787.12x = 7,980,221.67
  5. Step 5: Solve for x
    x = 7,980,221.67/2,787.12
  6. Step 6: Final answer
    x = 2,863.25

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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.