Home / 20,887.48-31,269.66-11,005.48

Finding the Fourth Proportional to 20,887.48, 31,269.66 and 11,005.48

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Solution

The fourth proportional to 20,887.48, 31,269.66 and 11,005.48 is: 16,475.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887.48 : 31,269.66 = 11,005.48 : x
  2. Step 2: Convert to fraction form
    20,887.48/31,269.66 = 11,005.48/x
  3. Step 3: Cross multiply
    20,887.48x = 31,269.66 × 11,005.48
  4. Step 4: Simplify right side
    20,887.48x = 344,137,617.74
  5. Step 5: Solve for x
    x = 344,137,617.74/20,887.48
  6. Step 6: Final answer
    x = 16,475.78

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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.