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Finding the Fourth Proportional to 20,658.62, 28,509.10 and 12,273.50

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Solution

The fourth proportional to 20,658.62, 28,509.10 and 12,273.50 is: 16,937.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,658.62 : 28,509.10 = 12,273.50 : x
  2. Step 2: Convert to fraction form
    20,658.62/28,509.10 = 12,273.50/x
  3. Step 3: Cross multiply
    20,658.62x = 28,509.10 × 12,273.50
  4. Step 4: Simplify right side
    20,658.62x = 349,906,438.85
  5. Step 5: Solve for x
    x = 349,906,438.85/20,658.62
  6. Step 6: Final answer
    x = 16,937.55

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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.