Home / 31,228.61-43,057.78-21,676.61

Finding the Fourth Proportional to 31,228.61, 43,057.78 and 21,676.61

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Solution

The fourth proportional to 31,228.61, 43,057.78 and 21,676.61 is: 29,887.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,228.61 : 43,057.78 = 21,676.61 : x
  2. Step 2: Convert to fraction form
    31,228.61/43,057.78 = 21,676.61/x
  3. Step 3: Cross multiply
    31,228.61x = 43,057.78 × 21,676.61
  4. Step 4: Simplify right side
    31,228.61x = 933,346,757.98
  5. Step 5: Solve for x
    x = 933,346,757.98/31,228.61
  6. Step 6: Final answer
    x = 29,887.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.