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Finding the Fourth Proportional to 21,679.97, 32,506.45 and 9,978.17

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Solution

The fourth proportional to 21,679.97, 32,506.45 and 9,978.17 is: 14,961.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,679.97 : 32,506.45 = 9,978.17 : x
  2. Step 2: Convert to fraction form
    21,679.97/32,506.45 = 9,978.17/x
  3. Step 3: Cross multiply
    21,679.97x = 32,506.45 × 9,978.17
  4. Step 4: Simplify right side
    21,679.97x = 324,354,696.72
  5. Step 5: Solve for x
    x = 324,354,696.72/21,679.97
  6. Step 6: Final answer
    x = 14,961.03

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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.