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Finding the Fourth Proportional to 5,287.95, 7,921.67 and 2,821.95

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Solution

The fourth proportional to 5,287.95, 7,921.67 and 2,821.95 is: 4,227.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,287.95 : 7,921.67 = 2,821.95 : x
  2. Step 2: Convert to fraction form
    5,287.95/7,921.67 = 2,821.95/x
  3. Step 3: Cross multiply
    5,287.95x = 7,921.67 × 2,821.95
  4. Step 4: Simplify right side
    5,287.95x = 22,354,542.55
  5. Step 5: Solve for x
    x = 22,354,542.55/5,287.95
  6. Step 6: Final answer
    x = 4,227.45

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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.