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Finding the Fourth Proportional to 20,662.59, 28,515.06 and 12,163.17

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Solution

The fourth proportional to 20,662.59, 28,515.06 and 12,163.17 is: 16,785.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,662.59 : 28,515.06 = 12,163.17 : x
  2. Step 2: Convert to fraction form
    20,662.59/28,515.06 = 12,163.17/x
  3. Step 3: Cross multiply
    20,662.59x = 28,515.06 × 12,163.17
  4. Step 4: Simplify right side
    20,662.59x = 346,833,522.34
  5. Step 5: Solve for x
    x = 346,833,522.34/20,662.59
  6. Step 6: Final answer
    x = 16,785.58

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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.