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Finding the Fourth Proportional to 31,607.92, 43,627.59 and 19,664.11

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Solution

The fourth proportional to 31,607.92, 43,627.59 and 19,664.11 is: 27,141.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,607.92 : 43,627.59 = 19,664.11 : x
  2. Step 2: Convert to fraction form
    31,607.92/43,627.59 = 19,664.11/x
  3. Step 3: Cross multiply
    31,607.92x = 43,627.59 × 19,664.11
  4. Step 4: Simplify right side
    31,607.92x = 857,897,728.79
  5. Step 5: Solve for x
    x = 857,897,728.79/31,607.92
  6. Step 6: Final answer
    x = 27,141.86

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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.