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Finding the Fourth Proportional to 20,651.84, 30,963.85 and 12,337.66

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Solution

The fourth proportional to 20,651.84, 30,963.85 and 12,337.66 is: 18,498.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,651.84 : 30,963.85 = 12,337.66 : x
  2. Step 2: Convert to fraction form
    20,651.84/30,963.85 = 12,337.66/x
  3. Step 3: Cross multiply
    20,651.84x = 30,963.85 × 12,337.66
  4. Step 4: Simplify right side
    20,651.84x = 382,021,345.34
  5. Step 5: Solve for x
    x = 382,021,345.34/20,651.84
  6. Step 6: Final answer
    x = 18,498.18

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1.5x scale

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.