Home / 31,686.44-43,687.58-20,335.91

Finding the Fourth Proportional to 31,686.44, 43,687.58 and 20,335.91

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Solution

The fourth proportional to 31,686.44, 43,687.58 and 20,335.91 is: 28,038.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,686.44 : 43,687.58 = 20,335.91 : x
  2. Step 2: Convert to fraction form
    31,686.44/43,687.58 = 20,335.91/x
  3. Step 3: Cross multiply
    31,686.44x = 43,687.58 × 20,335.91
  4. Step 4: Simplify right side
    31,686.44x = 888,426,374.88
  5. Step 5: Solve for x
    x = 888,426,374.88/31,686.44
  6. Step 6: Final answer
    x = 28,038.07

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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.