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Finding the Fourth Proportional to 5,253.40, 7,873.40 and 2,789.40

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Solution

The fourth proportional to 5,253.40, 7,873.40 and 2,789.40 is: 4,180.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,253.40 : 7,873.40 = 2,789.40 : x
  2. Step 2: Convert to fraction form
    5,253.40/7,873.40 = 2,789.40/x
  3. Step 3: Cross multiply
    5,253.40x = 7,873.40 × 2,789.40
  4. Step 4: Simplify right side
    5,253.40x = 21,962,061.96
  5. Step 5: Solve for x
    x = 21,962,061.96/5,253.40
  6. Step 6: Final answer
    x = 4,180.54

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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.