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Finding the Fourth Proportional to 8,907.96, 12,289.12 and 5,369.16

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Solution

The fourth proportional to 8,907.96, 12,289.12 and 5,369.16 is: 7,407.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,907.96 : 12,289.12 = 5,369.16 : x
  2. Step 2: Convert to fraction form
    8,907.96/12,289.12 = 5,369.16/x
  3. Step 3: Cross multiply
    8,907.96x = 12,289.12 × 5,369.16
  4. Step 4: Simplify right side
    8,907.96x = 65,982,251.54
  5. Step 5: Solve for x
    x = 65,982,251.54/8,907.96
  6. Step 6: Final answer
    x = 7,407.11

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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.