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Finding the Fourth Proportional to 20,672.87, 28,522.13 and 11,717.10

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Solution

The fourth proportional to 20,672.87, 28,522.13 and 11,717.10 is: 16,165.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,672.87 : 28,522.13 = 11,717.10 : x
  2. Step 2: Convert to fraction form
    20,672.87/28,522.13 = 11,717.10/x
  3. Step 3: Cross multiply
    20,672.87x = 28,522.13 × 11,717.10
  4. Step 4: Simplify right side
    20,672.87x = 334,196,590.84
  5. Step 5: Solve for x
    x = 334,196,590.84/20,672.87
  6. Step 6: Final answer
    x = 16,165.95

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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.