Home / 21,279.35-31,913.91-9,426.57

Finding the Fourth Proportional to 21,279.35, 31,913.91 and 9,426.57

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Solution

The fourth proportional to 21,279.35, 31,913.91 and 9,426.57 is: 14,137.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,279.35 : 31,913.91 = 9,426.57 : x
  2. Step 2: Convert to fraction form
    21,279.35/31,913.91 = 9,426.57/x
  3. Step 3: Cross multiply
    21,279.35x = 31,913.91 × 9,426.57
  4. Step 4: Simplify right side
    21,279.35x = 300,838,706.59
  5. Step 5: Solve for x
    x = 300,838,706.59/21,279.35
  6. Step 6: Final answer
    x = 14,137.59

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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.