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Finding the Fourth Proportional to 21,699.62, 32,549.43 and 20,591.54

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Solution

The fourth proportional to 21,699.62, 32,549.43 and 20,591.54 is: 30,887.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,699.62 : 32,549.43 = 20,591.54 : x
  2. Step 2: Convert to fraction form
    21,699.62/32,549.43 = 20,591.54/x
  3. Step 3: Cross multiply
    21,699.62x = 32,549.43 × 20,591.54
  4. Step 4: Simplify right side
    21,699.62x = 670,242,889.82
  5. Step 5: Solve for x
    x = 670,242,889.82/21,699.62
  6. Step 6: Final answer
    x = 30,887.31

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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.