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Finding the Fourth Proportional to 18,858.16, 28,293.16 and 7,770.08

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Solution

The fourth proportional to 18,858.16, 28,293.16 and 7,770.08 is: 11,657.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,858.16 : 28,293.16 = 7,770.08 : x
  2. Step 2: Convert to fraction form
    18,858.16/28,293.16 = 7,770.08/x
  3. Step 3: Cross multiply
    18,858.16x = 28,293.16 × 7,770.08
  4. Step 4: Simplify right side
    18,858.16x = 219,840,116.65
  5. Step 5: Solve for x
    x = 219,840,116.65/18,858.16
  6. Step 6: Final answer
    x = 11,657.56

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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.