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Finding the Fourth Proportional to 20,583, 28,405.04 and 12,620.61

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Solution

The fourth proportional to 20,583, 28,405.04 and 12,620.61 is: 17,416.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,583 : 28,405.04 = 12,620.61 : x
  2. Step 2: Convert to fraction form
    20,583/28,405.04 = 12,620.61/x
  3. Step 3: Cross multiply
    20,583x = 28,405.04 × 12,620.61
  4. Step 4: Simplify right side
    20,583x = 358,488,868.77
  5. Step 5: Solve for x
    x = 358,488,868.77/20,583
  6. Step 6: Final answer
    x = 17,416.75

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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.