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Finding the Fourth Proportional to 18,933.13, 28,398.88 and 7,245.64

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Solution

The fourth proportional to 18,933.13, 28,398.88 and 7,245.64 is: 10,868.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,933.13 : 28,398.88 = 7,245.64 : x
  2. Step 2: Convert to fraction form
    18,933.13/28,398.88 = 7,245.64/x
  3. Step 3: Cross multiply
    18,933.13x = 28,398.88 × 7,245.64
  4. Step 4: Simplify right side
    18,933.13x = 205,768,060.88
  5. Step 5: Solve for x
    x = 205,768,060.88/18,933.13
  6. Step 6: Final answer
    x = 10,868.15

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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.