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Finding the Fourth Proportional to 21,920.63, 32,881.12 and 6,338.39

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Solution

The fourth proportional to 21,920.63, 32,881.12 and 6,338.39 is: 9,507.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,920.63 : 32,881.12 = 6,338.39 : x
  2. Step 2: Convert to fraction form
    21,920.63/32,881.12 = 6,338.39/x
  3. Step 3: Cross multiply
    21,920.63x = 32,881.12 × 6,338.39
  4. Step 4: Simplify right side
    21,920.63x = 208,413,181.95
  5. Step 5: Solve for x
    x = 208,413,181.95/21,920.63
  6. Step 6: Final answer
    x = 9,507.63

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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.