Home / 21,638.03-29,860.86-12,691.98

Finding the Fourth Proportional to 21,638.03, 29,860.86 and 12,691.98

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Solution

The fourth proportional to 21,638.03, 29,860.86 and 12,691.98 is: 17,515.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,638.03 : 29,860.86 = 12,691.98 : x
  2. Step 2: Convert to fraction form
    21,638.03/29,860.86 = 12,691.98/x
  3. Step 3: Cross multiply
    21,638.03x = 29,860.86 × 12,691.98
  4. Step 4: Simplify right side
    21,638.03x = 378,993,437.90
  5. Step 5: Solve for x
    x = 378,993,437.90/21,638.03
  6. Step 6: Final answer
    x = 17,515.16

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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.