Home / 21,729.72-29,985.54-12,297.72

Finding the Fourth Proportional to 21,729.72, 29,985.54 and 12,297.72

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Solution

The fourth proportional to 21,729.72, 29,985.54 and 12,297.72 is: 16,970.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,729.72 : 29,985.54 = 12,297.72 : x
  2. Step 2: Convert to fraction form
    21,729.72/29,985.54 = 12,297.72/x
  3. Step 3: Cross multiply
    21,729.72x = 29,985.54 × 12,297.72
  4. Step 4: Simplify right side
    21,729.72x = 368,753,774.97
  5. Step 5: Solve for x
    x = 368,753,774.97/21,729.72
  6. Step 6: Final answer
    x = 16,970.02

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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.