Home / 21,265.50-31,887.62-12,383.79

Finding the Fourth Proportional to 21,265.50, 31,887.62 and 12,383.79

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Solution

The fourth proportional to 21,265.50, 31,887.62 and 12,383.79 is: 18,569.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,265.50 : 31,887.62 = 12,383.79 : x
  2. Step 2: Convert to fraction form
    21,265.50/31,887.62 = 12,383.79/x
  3. Step 3: Cross multiply
    21,265.50x = 31,887.62 × 12,383.79
  4. Step 4: Simplify right side
    21,265.50x = 394,889,589.68
  5. Step 5: Solve for x
    x = 394,889,589.68/21,265.50
  6. Step 6: Final answer
    x = 18,569.49

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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.