Home / 42,898.78-64,331.97-20,704.78

Finding the Fourth Proportional to 42,898.78, 64,331.97 and 20,704.78

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Solution

The fourth proportional to 42,898.78, 64,331.97 and 20,704.78 is: 31,049.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,898.78 : 64,331.97 = 20,704.78 : x
  2. Step 2: Convert to fraction form
    42,898.78/64,331.97 = 20,704.78/x
  3. Step 3: Cross multiply
    42,898.78x = 64,331.97 × 20,704.78
  4. Step 4: Simplify right side
    42,898.78x = 1,331,979,285.82
  5. Step 5: Solve for x
    x = 1,331,979,285.82/42,898.78
  6. Step 6: Final answer
    x = 31,049.35

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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.