Home / 21,213.31-31,821.56-6,423.42

Finding the Fourth Proportional to 21,213.31, 31,821.56 and 6,423.42

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Solution

The fourth proportional to 21,213.31, 31,821.56 and 6,423.42 is: 9,635.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,213.31 : 31,821.56 = 6,423.42 : x
  2. Step 2: Convert to fraction form
    21,213.31/31,821.56 = 6,423.42/x
  3. Step 3: Cross multiply
    21,213.31x = 31,821.56 × 6,423.42
  4. Step 4: Simplify right side
    21,213.31x = 204,403,177.24
  5. Step 5: Solve for x
    x = 204,403,177.24/21,213.31
  6. Step 6: Final answer
    x = 9,635.61

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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.