Home / 21,189.98-29,229.26-15,229.72

Finding the Fourth Proportional to 21,189.98, 29,229.26 and 15,229.72

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Solution

The fourth proportional to 21,189.98, 29,229.26 and 15,229.72 is: 21,007.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.98 : 29,229.26 = 15,229.72 : x
  2. Step 2: Convert to fraction form
    21,189.98/29,229.26 = 15,229.72/x
  3. Step 3: Cross multiply
    21,189.98x = 29,229.26 × 15,229.72
  4. Step 4: Simplify right side
    21,189.98x = 445,153,406.00
  5. Step 5: Solve for x
    x = 445,153,406.00/21,189.98
  6. Step 6: Final answer
    x = 21,007.73

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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.