Home / 22,379.88-30,880.20-12,689.37

Finding the Fourth Proportional to 22,379.88, 30,880.20 and 12,689.37

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Solution

The fourth proportional to 22,379.88, 30,880.20 and 12,689.37 is: 17,509.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,379.88 : 30,880.20 = 12,689.37 : x
  2. Step 2: Convert to fraction form
    22,379.88/30,880.20 = 12,689.37/x
  3. Step 3: Cross multiply
    22,379.88x = 30,880.20 × 12,689.37
  4. Step 4: Simplify right side
    22,379.88x = 391,850,283.47
  5. Step 5: Solve for x
    x = 391,850,283.47/22,379.88
  6. Step 6: Final answer
    x = 17,509.04

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1.5x scale

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.