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Finding the Fourth Proportional to 9,209.34, 12,709.14 and 5,230.20

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Solution

The fourth proportional to 9,209.34, 12,709.14 and 5,230.20 is: 7,217.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,209.34 : 12,709.14 = 5,230.20 : x
  2. Step 2: Convert to fraction form
    9,209.34/12,709.14 = 5,230.20/x
  3. Step 3: Cross multiply
    9,209.34x = 12,709.14 × 5,230.20
  4. Step 4: Simplify right side
    9,209.34x = 66,471,344.03
  5. Step 5: Solve for x
    x = 66,471,344.03/9,209.34
  6. Step 6: Final answer
    x = 7,217.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.