Home / 21,271.21-29,355.24-11,839.75

Finding the Fourth Proportional to 21,271.21, 29,355.24 and 11,839.75

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Solution

The fourth proportional to 21,271.21, 29,355.24 and 11,839.75 is: 16,339.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.21 : 29,355.24 = 11,839.75 : x
  2. Step 2: Convert to fraction form
    21,271.21/29,355.24 = 11,839.75/x
  3. Step 3: Cross multiply
    21,271.21x = 29,355.24 × 11,839.75
  4. Step 4: Simplify right side
    21,271.21x = 347,558,702.79
  5. Step 5: Solve for x
    x = 347,558,702.79/21,271.21
  6. Step 6: Final answer
    x = 16,339.40

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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.