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Finding the Fourth Proportional to 21,998.75, 30,372.00 and 15,282.11

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Solution

The fourth proportional to 21,998.75, 30,372.00 and 15,282.11 is: 21,098.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,998.75 : 30,372.00 = 15,282.11 : x
  2. Step 2: Convert to fraction form
    21,998.75/30,372.00 = 15,282.11/x
  3. Step 3: Cross multiply
    21,998.75x = 30,372.00 × 15,282.11
  4. Step 4: Simplify right side
    21,998.75x = 464,148,168.51
  5. Step 5: Solve for x
    x = 464,148,168.51/21,998.75
  6. Step 6: Final answer
    x = 21,098.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.