Home / 21,086.21-31,644.09-15,553.91

Finding the Fourth Proportional to 21,086.21, 31,644.09 and 15,553.91

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Solution

The fourth proportional to 21,086.21, 31,644.09 and 15,553.91 is: 23,341.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,086.21 : 31,644.09 = 15,553.91 : x
  2. Step 2: Convert to fraction form
    21,086.21/31,644.09 = 15,553.91/x
  3. Step 3: Cross multiply
    21,086.21x = 31,644.09 × 15,553.91
  4. Step 4: Simplify right side
    21,086.21x = 492,189,327.89
  5. Step 5: Solve for x
    x = 492,189,327.89/21,086.21
  6. Step 6: Final answer
    x = 23,341.76

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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.