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Finding the Fourth Proportional to 18,768.52, 28,148.62 and 5,619.16

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Solution

The fourth proportional to 18,768.52, 28,148.62 and 5,619.16 is: 8,427.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,768.52 : 28,148.62 = 5,619.16 : x
  2. Step 2: Convert to fraction form
    18,768.52/28,148.62 = 5,619.16/x
  3. Step 3: Cross multiply
    18,768.52x = 28,148.62 × 5,619.16
  4. Step 4: Simplify right side
    18,768.52x = 158,171,599.56
  5. Step 5: Solve for x
    x = 158,171,599.56/18,768.52
  6. Step 6: Final answer
    x = 8,427.49

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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.