Home / 2,809.90-3,877.88-1,551.20

Finding the Fourth Proportional to 2,809.90, 3,877.88 and 1,551.20

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Solution

The fourth proportional to 2,809.90, 3,877.88 and 1,551.20 is: 2,140.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,809.90 : 3,877.88 = 1,551.20 : x
  2. Step 2: Convert to fraction form
    2,809.90/3,877.88 = 1,551.20/x
  3. Step 3: Cross multiply
    2,809.90x = 3,877.88 × 1,551.20
  4. Step 4: Simplify right side
    2,809.90x = 6,015,359.70
  5. Step 5: Solve for x
    x = 6,015,359.70/2,809.90
  6. Step 6: Final answer
    x = 2,140.78

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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.