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Finding the Fourth Proportional to 18,934.56, 28,409.13 and 7,245.05

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Solution

The fourth proportional to 18,934.56, 28,409.13 and 7,245.05 is: 10,870.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,934.56 : 28,409.13 = 7,245.05 : x
  2. Step 2: Convert to fraction form
    18,934.56/28,409.13 = 7,245.05/x
  3. Step 3: Cross multiply
    18,934.56x = 28,409.13 × 7,245.05
  4. Step 4: Simplify right side
    18,934.56x = 205,825,425.26
  5. Step 5: Solve for x
    x = 205,825,425.26/18,934.56
  6. Step 6: Final answer
    x = 10,870.36

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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.