Home / 2,787.80-4,176.90-1,813.40

Finding the Fourth Proportional to 2,787.80, 4,176.90 and 1,813.40

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Solution

The fourth proportional to 2,787.80, 4,176.90 and 1,813.40 is: 2,716.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.80 : 4,176.90 = 1,813.40 : x
  2. Step 2: Convert to fraction form
    2,787.80/4,176.90 = 1,813.40/x
  3. Step 3: Cross multiply
    2,787.80x = 4,176.90 × 1,813.40
  4. Step 4: Simplify right side
    2,787.80x = 7,574,390.46
  5. Step 5: Solve for x
    x = 7,574,390.46/2,787.80
  6. Step 6: Final answer
    x = 2,716.98

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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.