Home / 31,639.36-43,642.98-20,305

Finding the Fourth Proportional to 31,639.36, 43,642.98 and 20,305

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Solution

The fourth proportional to 31,639.36, 43,642.98 and 20,305 is: 28,008.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,639.36 : 43,642.98 = 20,305 : x
  2. Step 2: Convert to fraction form
    31,639.36/43,642.98 = 20,305/x
  3. Step 3: Cross multiply
    31,639.36x = 43,642.98 × 20,305
  4. Step 4: Simplify right side
    31,639.36x = 886,170,708.90
  5. Step 5: Solve for x
    x = 886,170,708.90/31,639.36
  6. Step 6: Final answer
    x = 28,008.49

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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.