Home / 20,941.12-31,370.16-12,623.32

Finding the Fourth Proportional to 20,941.12, 31,370.16 and 12,623.32

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Solution

The fourth proportional to 20,941.12, 31,370.16 and 12,623.32 is: 18,909.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,941.12 : 31,370.16 = 12,623.32 : x
  2. Step 2: Convert to fraction form
    20,941.12/31,370.16 = 12,623.32/x
  3. Step 3: Cross multiply
    20,941.12x = 31,370.16 × 12,623.32
  4. Step 4: Simplify right side
    20,941.12x = 395,995,568.13
  5. Step 5: Solve for x
    x = 395,995,568.13/20,941.12
  6. Step 6: Final answer
    x = 18,909.95

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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.