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Finding the Fourth Proportional to 18,697.87, 28,047.21 and 5,551.17

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Solution

The fourth proportional to 18,697.87, 28,047.21 and 5,551.17 is: 8,326.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,697.87 : 28,047.21 = 5,551.17 : x
  2. Step 2: Convert to fraction form
    18,697.87/28,047.21 = 5,551.17/x
  3. Step 3: Cross multiply
    18,697.87x = 28,047.21 × 5,551.17
  4. Step 4: Simplify right side
    18,697.87x = 155,694,830.74
  5. Step 5: Solve for x
    x = 155,694,830.74/18,697.87
  6. Step 6: Final answer
    x = 8,326.88

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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.