Home / 21,081.43-31,606.77-12,184.21

Finding the Fourth Proportional to 21,081.43, 31,606.77 and 12,184.21

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Solution

The fourth proportional to 21,081.43, 31,606.77 and 12,184.21 is: 18,267.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.43 : 31,606.77 = 12,184.21 : x
  2. Step 2: Convert to fraction form
    21,081.43/31,606.77 = 12,184.21/x
  3. Step 3: Cross multiply
    21,081.43x = 31,606.77 × 12,184.21
  4. Step 4: Simplify right side
    21,081.43x = 385,103,523.10
  5. Step 5: Solve for x
    x = 385,103,523.10/21,081.43
  6. Step 6: Final answer
    x = 18,267.43

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1.5x scale

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.