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Finding the Fourth Proportional to 9,485.12, 14,223 and 2,909.72

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Solution

The fourth proportional to 9,485.12, 14,223 and 2,909.72 is: 4,363.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,485.12 : 14,223 = 2,909.72 : x
  2. Step 2: Convert to fraction form
    9,485.12/14,223 = 2,909.72/x
  3. Step 3: Cross multiply
    9,485.12x = 14,223 × 2,909.72
  4. Step 4: Simplify right side
    9,485.12x = 41,384,947.56
  5. Step 5: Solve for x
    x = 41,384,947.56/9,485.12
  6. Step 6: Final answer
    x = 4,363.14

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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.