Home / 20,997.36-31,490.64-10,456.56

Finding the Fourth Proportional to 20,997.36, 31,490.64 and 10,456.56

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Solution

The fourth proportional to 20,997.36, 31,490.64 and 10,456.56 is: 15,682.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,997.36 : 31,490.64 = 10,456.56 : x
  2. Step 2: Convert to fraction form
    20,997.36/31,490.64 = 10,456.56/x
  3. Step 3: Cross multiply
    20,997.36x = 31,490.64 × 10,456.56
  4. Step 4: Simplify right side
    20,997.36x = 329,283,766.60
  5. Step 5: Solve for x
    x = 329,283,766.60/20,997.36
  6. Step 6: Final answer
    x = 15,682.15

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1.5x scale

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.