Home / 21,255.40-29,331.78-11,823.88

Finding the Fourth Proportional to 21,255.40, 29,331.78 and 11,823.88

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Solution

The fourth proportional to 21,255.40, 29,331.78 and 11,823.88 is: 16,316.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,255.40 : 29,331.78 = 11,823.88 : x
  2. Step 2: Convert to fraction form
    21,255.40/29,331.78 = 11,823.88/x
  3. Step 3: Cross multiply
    21,255.40x = 29,331.78 × 11,823.88
  4. Step 4: Simplify right side
    21,255.40x = 346,815,446.91
  5. Step 5: Solve for x
    x = 346,815,446.91/21,255.40
  6. Step 6: Final answer
    x = 16,316.58

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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.