Home / 2,587.75-3,869.70-1,921.90

Finding the Fourth Proportional to 2,587.75, 3,869.70 and 1,921.90

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Solution

The fourth proportional to 2,587.75, 3,869.70 and 1,921.90 is: 2,874.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,587.75 : 3,869.70 = 1,921.90 : x
  2. Step 2: Convert to fraction form
    2,587.75/3,869.70 = 1,921.90/x
  3. Step 3: Cross multiply
    2,587.75x = 3,869.70 × 1,921.90
  4. Step 4: Simplify right side
    2,587.75x = 7,437,174.06
  5. Step 5: Solve for x
    x = 7,437,174.06/2,587.75
  6. Step 6: Final answer
    x = 2,874.00

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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.