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Finding the Fourth Proportional to 21,754.96, 32,645.40 and 7,905.04

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Solution

The fourth proportional to 21,754.96, 32,645.40 and 7,905.04 is: 11,862.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,754.96 : 32,645.40 = 7,905.04 : x
  2. Step 2: Convert to fraction form
    21,754.96/32,645.40 = 7,905.04/x
  3. Step 3: Cross multiply
    21,754.96x = 32,645.40 × 7,905.04
  4. Step 4: Simplify right side
    21,754.96x = 258,063,192.82
  5. Step 5: Solve for x
    x = 258,063,192.82/21,754.96
  6. Step 6: Final answer
    x = 11,862.27

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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.