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Finding the Fourth Proportional to 21,900.04, 32,850.58 and 7,109

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Solution

The fourth proportional to 21,900.04, 32,850.58 and 7,109 is: 10,663.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,900.04 : 32,850.58 = 7,109 : x
  2. Step 2: Convert to fraction form
    21,900.04/32,850.58 = 7,109/x
  3. Step 3: Cross multiply
    21,900.04x = 32,850.58 × 7,109
  4. Step 4: Simplify right side
    21,900.04x = 233,534,773.22
  5. Step 5: Solve for x
    x = 233,534,773.22/21,900.04
  6. Step 6: Final answer
    x = 10,663.67

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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.