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Finding the Fourth Proportional to 20,894.71, 28,834.46 and 11,463.26

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Solution

The fourth proportional to 20,894.71, 28,834.46 and 11,463.26 is: 15,819.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,894.71 : 28,834.46 = 11,463.26 : x
  2. Step 2: Convert to fraction form
    20,894.71/28,834.46 = 11,463.26/x
  3. Step 3: Cross multiply
    20,894.71x = 28,834.46 × 11,463.26
  4. Step 4: Simplify right side
    20,894.71x = 330,536,854.62
  5. Step 5: Solve for x
    x = 330,536,854.62/20,894.71
  6. Step 6: Final answer
    x = 15,819.17

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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.