Home / 31,724.16-43,759.49-20,408.39

Finding the Fourth Proportional to 31,724.16, 43,759.49 and 20,408.39

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Solution

The fourth proportional to 31,724.16, 43,759.49 and 20,408.39 is: 28,150.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,724.16 : 43,759.49 = 20,408.39 : x
  2. Step 2: Convert to fraction form
    31,724.16/43,759.49 = 20,408.39/x
  3. Step 3: Cross multiply
    31,724.16x = 43,759.49 × 20,408.39
  4. Step 4: Simplify right side
    31,724.16x = 893,060,417.28
  5. Step 5: Solve for x
    x = 893,060,417.28/31,724.16
  6. Step 6: Final answer
    x = 28,150.80

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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.