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Finding the Fourth Proportional to 31,486, 43,446.90 and 18,056.56

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Solution

The fourth proportional to 31,486, 43,446.90 and 18,056.56 is: 24,915.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,486 : 43,446.90 = 18,056.56 : x
  2. Step 2: Convert to fraction form
    31,486/43,446.90 = 18,056.56/x
  3. Step 3: Cross multiply
    31,486x = 43,446.90 × 18,056.56
  4. Step 4: Simplify right side
    31,486x = 784,501,556.66
  5. Step 5: Solve for x
    x = 784,501,556.66/31,486
  6. Step 6: Final answer
    x = 24,915.89

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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.