Home / 21,136.97-31,705.38-6,345.87

Finding the Fourth Proportional to 21,136.97, 31,705.38 and 6,345.87

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Solution

The fourth proportional to 21,136.97, 31,705.38 and 6,345.87 is: 9,518.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,136.97 : 31,705.38 = 6,345.87 : x
  2. Step 2: Convert to fraction form
    21,136.97/31,705.38 = 6,345.87/x
  3. Step 3: Cross multiply
    21,136.97x = 31,705.38 × 6,345.87
  4. Step 4: Simplify right side
    21,136.97x = 201,198,219.78
  5. Step 5: Solve for x
    x = 201,198,219.78/21,136.97
  6. Step 6: Final answer
    x = 9,518.78

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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.