Home / 21,269.97-31,869.85-12,360.29

Finding the Fourth Proportional to 21,269.97, 31,869.85 and 12,360.29

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Solution

The fourth proportional to 21,269.97, 31,869.85 and 12,360.29 is: 18,520.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,269.97 : 31,869.85 = 12,360.29 : x
  2. Step 2: Convert to fraction form
    21,269.97/31,869.85 = 12,360.29/x
  3. Step 3: Cross multiply
    21,269.97x = 31,869.85 × 12,360.29
  4. Step 4: Simplify right side
    21,269.97x = 393,920,588.26
  5. Step 5: Solve for x
    x = 393,920,588.26/21,269.97
  6. Step 6: Final answer
    x = 18,520.03

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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.