Home / 20,813.23-31,205.25-7,663.87

Finding the Fourth Proportional to 20,813.23, 31,205.25 and 7,663.87

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Solution

The fourth proportional to 20,813.23, 31,205.25 and 7,663.87 is: 11,490.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,813.23 : 31,205.25 = 7,663.87 : x
  2. Step 2: Convert to fraction form
    20,813.23/31,205.25 = 7,663.87/x
  3. Step 3: Cross multiply
    20,813.23x = 31,205.25 × 7,663.87
  4. Step 4: Simplify right side
    20,813.23x = 239,152,979.32
  5. Step 5: Solve for x
    x = 239,152,979.32/20,813.23
  6. Step 6: Final answer
    x = 11,490.43

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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.