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Finding the Fourth Proportional to 15,174.25, 20,940.65 and 8,801.11

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Solution

The fourth proportional to 15,174.25, 20,940.65 and 8,801.11 is: 12,145.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,174.25 : 20,940.65 = 8,801.11 : x
  2. Step 2: Convert to fraction form
    15,174.25/20,940.65 = 8,801.11/x
  3. Step 3: Cross multiply
    15,174.25x = 20,940.65 × 8,801.11
  4. Step 4: Simplify right side
    15,174.25x = 184,300,933.77
  5. Step 5: Solve for x
    x = 184,300,933.77/15,174.25
  6. Step 6: Final answer
    x = 12,145.64

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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.