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Finding the Fourth Proportional to 21,788.61, 32,679.81 and 6,998.82

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Solution

The fourth proportional to 21,788.61, 32,679.81 and 6,998.82 is: 10,497.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,788.61 : 32,679.81 = 6,998.82 : x
  2. Step 2: Convert to fraction form
    21,788.61/32,679.81 = 6,998.82/x
  3. Step 3: Cross multiply
    21,788.61x = 32,679.81 × 6,998.82
  4. Step 4: Simplify right side
    21,788.61x = 228,720,107.82
  5. Step 5: Solve for x
    x = 228,720,107.82/21,788.61
  6. Step 6: Final answer
    x = 10,497.23

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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.