Home / 21,287.25-29,376.40-12,339.94

Finding the Fourth Proportional to 21,287.25, 29,376.40 and 12,339.94

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Solution

The fourth proportional to 21,287.25, 29,376.40 and 12,339.94 is: 17,029.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.25 : 29,376.40 = 12,339.94 : x
  2. Step 2: Convert to fraction form
    21,287.25/29,376.40 = 12,339.94/x
  3. Step 3: Cross multiply
    21,287.25x = 29,376.40 × 12,339.94
  4. Step 4: Simplify right side
    21,287.25x = 362,503,013.42
  5. Step 5: Solve for x
    x = 362,503,013.42/21,287.25
  6. Step 6: Final answer
    x = 17,029.11

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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.