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Finding the Fourth Proportional to 20,795.63, 28,698.17 and 11,364.19

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Solution

The fourth proportional to 20,795.63, 28,698.17 and 11,364.19 is: 15,682.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,795.63 : 28,698.17 = 11,364.19 : x
  2. Step 2: Convert to fraction form
    20,795.63/28,698.17 = 11,364.19/x
  3. Step 3: Cross multiply
    20,795.63x = 28,698.17 × 11,364.19
  4. Step 4: Simplify right side
    20,795.63x = 326,131,327.97
  5. Step 5: Solve for x
    x = 326,131,327.97/20,795.63
  6. Step 6: Final answer
    x = 15,682.69

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Half scale
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Double scale
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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.