Home / 19,820.43-29,708.78-8,123.63

Finding the Fourth Proportional to 19,820.43, 29,708.78 and 8,123.63

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Solution

The fourth proportional to 19,820.43, 29,708.78 and 8,123.63 is: 12,176.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,820.43 : 29,708.78 = 8,123.63 : x
  2. Step 2: Convert to fraction form
    19,820.43/29,708.78 = 8,123.63/x
  3. Step 3: Cross multiply
    19,820.43x = 29,708.78 × 8,123.63
  4. Step 4: Simplify right side
    19,820.43x = 241,342,947.31
  5. Step 5: Solve for x
    x = 241,342,947.31/19,820.43
  6. Step 6: Final answer
    x = 12,176.47

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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.