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Finding the Fourth Proportional to 21,859.02, 32,788.80 and 7,066.80

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Solution

The fourth proportional to 21,859.02, 32,788.80 and 7,066.80 is: 10,600.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,859.02 : 32,788.80 = 7,066.80 : x
  2. Step 2: Convert to fraction form
    21,859.02/32,788.80 = 7,066.80/x
  3. Step 3: Cross multiply
    21,859.02x = 32,788.80 × 7,066.80
  4. Step 4: Simplify right side
    21,859.02x = 231,711,891.84
  5. Step 5: Solve for x
    x = 231,711,891.84/21,859.02
  6. Step 6: Final answer
    x = 10,600.29

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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.