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Finding the Fourth Proportional to 18,888.54, 28,336.26 and 7,789.08

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Solution

The fourth proportional to 18,888.54, 28,336.26 and 7,789.08 is: 11,685.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,888.54 : 28,336.26 = 7,789.08 : x
  2. Step 2: Convert to fraction form
    18,888.54/28,336.26 = 7,789.08/x
  3. Step 3: Cross multiply
    18,888.54x = 28,336.26 × 7,789.08
  4. Step 4: Simplify right side
    18,888.54x = 220,713,396.04
  5. Step 5: Solve for x
    x = 220,713,396.04/18,888.54
  6. Step 6: Final answer
    x = 11,685.04

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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.