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Finding the Fourth Proportional to 20,894.94, 28,835.06 and 11,463.57

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Solution

The fourth proportional to 20,894.94, 28,835.06 and 11,463.57 is: 15,819.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,894.94 : 28,835.06 = 11,463.57 : x
  2. Step 2: Convert to fraction form
    20,894.94/28,835.06 = 11,463.57/x
  3. Step 3: Cross multiply
    20,894.94x = 28,835.06 × 11,463.57
  4. Step 4: Simplify right side
    20,894.94x = 330,552,671.45
  5. Step 5: Solve for x
    x = 330,552,671.45/20,894.94
  6. Step 6: Final answer
    x = 15,819.75

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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.