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Finding the Fourth Proportional to 18,866.24, 28,310.48 and 7,189.28

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Solution

The fourth proportional to 18,866.24, 28,310.48 and 7,189.28 is: 10,788.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,866.24 : 28,310.48 = 7,189.28 : x
  2. Step 2: Convert to fraction form
    18,866.24/28,310.48 = 7,189.28/x
  3. Step 3: Cross multiply
    18,866.24x = 28,310.48 × 7,189.28
  4. Step 4: Simplify right side
    18,866.24x = 203,531,967.65
  5. Step 5: Solve for x
    x = 203,531,967.65/18,866.24
  6. Step 6: Final answer
    x = 10,788.16

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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.