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Finding the Fourth Proportional to 18,774.52, 28,170.44 and 7,086.76

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Solution

The fourth proportional to 18,774.52, 28,170.44 and 7,086.76 is: 10,633.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,774.52 : 28,170.44 = 7,086.76 : x
  2. Step 2: Convert to fraction form
    18,774.52/28,170.44 = 7,086.76/x
  3. Step 3: Cross multiply
    18,774.52x = 28,170.44 × 7,086.76
  4. Step 4: Simplify right side
    18,774.52x = 199,637,147.37
  5. Step 5: Solve for x
    x = 199,637,147.37/18,774.52
  6. Step 6: Final answer
    x = 10,633.41

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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.