Home / 21,388.43-29,515.19-11,827.70

Finding the Fourth Proportional to 21,388.43, 29,515.19 and 11,827.70

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Solution

The fourth proportional to 21,388.43, 29,515.19 and 11,827.70 is: 16,321.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,388.43 : 29,515.19 = 11,827.70 : x
  2. Step 2: Convert to fraction form
    21,388.43/29,515.19 = 11,827.70/x
  3. Step 3: Cross multiply
    21,388.43x = 29,515.19 × 11,827.70
  4. Step 4: Simplify right side
    21,388.43x = 349,096,606.05
  5. Step 5: Solve for x
    x = 349,096,606.05/21,388.43
  6. Step 6: Final answer
    x = 16,321.75

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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.