Home / 21,269.18-31,893.14-12,387.53

Finding the Fourth Proportional to 21,269.18, 31,893.14 and 12,387.53

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Solution

The fourth proportional to 21,269.18, 31,893.14 and 12,387.53 is: 18,575.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,269.18 : 31,893.14 = 12,387.53 : x
  2. Step 2: Convert to fraction form
    21,269.18/31,893.14 = 12,387.53/x
  3. Step 3: Cross multiply
    21,269.18x = 31,893.14 × 12,387.53
  4. Step 4: Simplify right side
    21,269.18x = 395,077,339.25
  5. Step 5: Solve for x
    x = 395,077,339.25/21,269.18
  6. Step 6: Final answer
    x = 18,575.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.