Home / 21,287.55-29,377.73-11,856.11

Finding the Fourth Proportional to 21,287.55, 29,377.73 and 11,856.11

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Solution

The fourth proportional to 21,287.55, 29,377.73 and 11,856.11 is: 16,361.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.55 : 29,377.73 = 11,856.11 : x
  2. Step 2: Convert to fraction form
    21,287.55/29,377.73 = 11,856.11/x
  3. Step 3: Cross multiply
    21,287.55x = 29,377.73 × 11,856.11
  4. Step 4: Simplify right side
    21,287.55x = 348,305,598.43
  5. Step 5: Solve for x
    x = 348,305,598.43/21,287.55
  6. Step 6: Final answer
    x = 16,361.94

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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.