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Finding the Fourth Proportional to 21,809.49, 32,669.84 and 19,993.07

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Solution

The fourth proportional to 21,809.49, 32,669.84 and 19,993.07 is: 29,948.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,809.49 : 32,669.84 = 19,993.07 : x
  2. Step 2: Convert to fraction form
    21,809.49/32,669.84 = 19,993.07/x
  3. Step 3: Cross multiply
    21,809.49x = 32,669.84 × 19,993.07
  4. Step 4: Simplify right side
    21,809.49x = 653,170,134.69
  5. Step 5: Solve for x
    x = 653,170,134.69/21,809.49
  6. Step 6: Final answer
    x = 29,948.90

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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.