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Finding the Fourth Proportional to 21,603.78, 32,404.05 and 6,812.37

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Solution

The fourth proportional to 21,603.78, 32,404.05 and 6,812.37 is: 10,218.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,603.78 : 32,404.05 = 6,812.37 : x
  2. Step 2: Convert to fraction form
    21,603.78/32,404.05 = 6,812.37/x
  3. Step 3: Cross multiply
    21,603.78x = 32,404.05 × 6,812.37
  4. Step 4: Simplify right side
    21,603.78x = 220,748,378.10
  5. Step 5: Solve for x
    x = 220,748,378.10/21,603.78
  6. Step 6: Final answer
    x = 10,218.04

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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.