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Finding the Fourth Proportional to 21,553, 32,330.28 and 6,761.56

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Solution

The fourth proportional to 21,553, 32,330.28 and 6,761.56 is: 10,142.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,553 : 32,330.28 = 6,761.56 : x
  2. Step 2: Convert to fraction form
    21,553/32,330.28 = 6,761.56/x
  3. Step 3: Cross multiply
    21,553x = 32,330.28 × 6,761.56
  4. Step 4: Simplify right side
    21,553x = 218,603,128.04
  5. Step 5: Solve for x
    x = 218,603,128.04/21,553
  6. Step 6: Final answer
    x = 10,142.58

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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.