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Finding the Fourth Proportional to 31,361.92, 43,259.76 and 18,606.07

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Solution

The fourth proportional to 31,361.92, 43,259.76 and 18,606.07 is: 25,664.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,361.92 : 43,259.76 = 18,606.07 : x
  2. Step 2: Convert to fraction form
    31,361.92/43,259.76 = 18,606.07/x
  3. Step 3: Cross multiply
    31,361.92x = 43,259.76 × 18,606.07
  4. Step 4: Simplify right side
    31,361.92x = 804,894,272.65
  5. Step 5: Solve for x
    x = 804,894,272.65/31,361.92
  6. Step 6: Final answer
    x = 25,664.70

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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.