Home / 21,279.70-31,915.62-10,747.24

Finding the Fourth Proportional to 21,279.70, 31,915.62 and 10,747.24

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Solution

The fourth proportional to 21,279.70, 31,915.62 and 10,747.24 is: 16,118.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,279.70 : 31,915.62 = 10,747.24 : x
  2. Step 2: Convert to fraction form
    21,279.70/31,915.62 = 10,747.24/x
  3. Step 3: Cross multiply
    21,279.70x = 31,915.62 × 10,747.24
  4. Step 4: Simplify right side
    21,279.70x = 343,004,827.89
  5. Step 5: Solve for x
    x = 343,004,827.89/21,279.70
  6. Step 6: Final answer
    x = 16,118.88

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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.