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Finding the Fourth Proportional to 15,174.50, 20,942.37 and 9,126.69

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Solution

The fourth proportional to 15,174.50, 20,942.37 and 9,126.69 is: 12,595.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,174.50 : 20,942.37 = 9,126.69 : x
  2. Step 2: Convert to fraction form
    15,174.50/20,942.37 = 9,126.69/x
  3. Step 3: Cross multiply
    15,174.50x = 20,942.37 × 9,126.69
  4. Step 4: Simplify right side
    15,174.50x = 191,134,518.86
  5. Step 5: Solve for x
    x = 191,134,518.86/15,174.50
  6. Step 6: Final answer
    x = 12,595.77

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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.