Home / 20,146.40-27,803.36-12,188.96

Finding the Fourth Proportional to 20,146.40, 27,803.36 and 12,188.96

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Solution

The fourth proportional to 20,146.40, 27,803.36 and 12,188.96 is: 16,821.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,146.40 : 27,803.36 = 12,188.96 : x
  2. Step 2: Convert to fraction form
    20,146.40/27,803.36 = 12,188.96/x
  3. Step 3: Cross multiply
    20,146.40x = 27,803.36 × 12,188.96
  4. Step 4: Simplify right side
    20,146.40x = 338,894,042.91
  5. Step 5: Solve for x
    x = 338,894,042.91/20,146.40
  6. Step 6: Final answer
    x = 16,821.57

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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.