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Finding the Fourth Proportional to 21,805.38, 32,712.94 and 7,954.38

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Solution

The fourth proportional to 21,805.38, 32,712.94 and 7,954.38 is: 11,933.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,805.38 : 32,712.94 = 7,954.38 : x
  2. Step 2: Convert to fraction form
    21,805.38/32,712.94 = 7,954.38/x
  3. Step 3: Cross multiply
    21,805.38x = 32,712.94 × 7,954.38
  4. Step 4: Simplify right side
    21,805.38x = 260,211,155.68
  5. Step 5: Solve for x
    x = 260,211,155.68/21,805.38
  6. Step 6: Final answer
    x = 11,933.35

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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.