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Finding the Fourth Proportional to 18,902.22, 28,341.18 and 7,209.06

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Solution

The fourth proportional to 18,902.22, 28,341.18 and 7,209.06 is: 10,808.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,902.22 : 28,341.18 = 7,209.06 : x
  2. Step 2: Convert to fraction form
    18,902.22/28,341.18 = 7,209.06/x
  3. Step 3: Cross multiply
    18,902.22x = 28,341.18 × 7,209.06
  4. Step 4: Simplify right side
    18,902.22x = 204,313,267.09
  5. Step 5: Solve for x
    x = 204,313,267.09/18,902.22
  6. Step 6: Final answer
    x = 10,808.96

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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.