Home / 20,623.98-30,865.84-12,731.47

Finding the Fourth Proportional to 20,623.98, 30,865.84 and 12,731.47

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Solution

The fourth proportional to 20,623.98, 30,865.84 and 12,731.47 is: 19,053.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,623.98 : 30,865.84 = 12,731.47 : x
  2. Step 2: Convert to fraction form
    20,623.98/30,865.84 = 12,731.47/x
  3. Step 3: Cross multiply
    20,623.98x = 30,865.84 × 12,731.47
  4. Step 4: Simplify right side
    20,623.98x = 392,967,515.98
  5. Step 5: Solve for x
    x = 392,967,515.98/20,623.98
  6. Step 6: Final answer
    x = 19,053.91

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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.