Home / 20,841.81-28,761.78-12,343.79

Finding the Fourth Proportional to 20,841.81, 28,761.78 and 12,343.79

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Solution

The fourth proportional to 20,841.81, 28,761.78 and 12,343.79 is: 17,034.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,841.81 : 28,761.78 = 12,343.79 : x
  2. Step 2: Convert to fraction form
    20,841.81/28,761.78 = 12,343.79/x
  3. Step 3: Cross multiply
    20,841.81x = 28,761.78 × 12,343.79
  4. Step 4: Simplify right side
    20,841.81x = 355,029,490.54
  5. Step 5: Solve for x
    x = 355,029,490.54/20,841.81
  6. Step 6: Final answer
    x = 17,034.49

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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.