Home / 21,287.41-29,377.53-11,855.97

Finding the Fourth Proportional to 21,287.41, 29,377.53 and 11,855.97

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Solution

The fourth proportional to 21,287.41, 29,377.53 and 11,855.97 is: 16,361.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.41 : 29,377.53 = 11,855.97 : x
  2. Step 2: Convert to fraction form
    21,287.41/29,377.53 = 11,855.97/x
  3. Step 3: Cross multiply
    21,287.41x = 29,377.53 × 11,855.97
  4. Step 4: Simplify right side
    21,287.41x = 348,299,114.35
  5. Step 5: Solve for x
    x = 348,299,114.35/21,287.41
  6. Step 6: Final answer
    x = 16,361.74

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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.