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Finding the Fourth Proportional to 21,791.93, 32,689.05 and 6,999.69

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Solution

The fourth proportional to 21,791.93, 32,689.05 and 6,999.69 is: 10,499.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,791.93 : 32,689.05 = 6,999.69 : x
  2. Step 2: Convert to fraction form
    21,791.93/32,689.05 = 6,999.69/x
  3. Step 3: Cross multiply
    21,791.93x = 32,689.05 × 6,999.69
  4. Step 4: Simplify right side
    21,791.93x = 228,813,216.39
  5. Step 5: Solve for x
    x = 228,813,216.39/21,791.93
  6. Step 6: Final answer
    x = 10,499.91

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.