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Finding the Fourth Proportional to 21,603.89, 32,404.62 and 6,812.48

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Solution

The fourth proportional to 21,603.89, 32,404.62 and 6,812.48 is: 10,218.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,603.89 : 32,404.62 = 6,812.48 : x
  2. Step 2: Convert to fraction form
    21,603.89/32,404.62 = 6,812.48/x
  3. Step 3: Cross multiply
    21,603.89x = 32,404.62 × 6,812.48
  4. Step 4: Simplify right side
    21,603.89x = 220,755,825.66
  5. Step 5: Solve for x
    x = 220,755,825.66/21,603.89
  6. Step 6: Final answer
    x = 10,218.34

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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.