Home / 21,311.28-29,408.52-11,878.08

Finding the Fourth Proportional to 21,311.28, 29,408.52 and 11,878.08

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Solution

The fourth proportional to 21,311.28, 29,408.52 and 11,878.08 is: 16,391.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,311.28 : 29,408.52 = 11,878.08 : x
  2. Step 2: Convert to fraction form
    21,311.28/29,408.52 = 11,878.08/x
  3. Step 3: Cross multiply
    21,311.28x = 29,408.52 × 11,878.08
  4. Step 4: Simplify right side
    21,311.28x = 349,316,753.24
  5. Step 5: Solve for x
    x = 349,316,753.24/21,311.28
  6. Step 6: Final answer
    x = 16,391.17

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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.