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Finding the Fourth Proportional to 34,687.72, 47,869.18 and 18,772.18

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Solution

The fourth proportional to 34,687.72, 47,869.18 and 18,772.18 is: 25,905.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,687.72 : 47,869.18 = 18,772.18 : x
  2. Step 2: Convert to fraction form
    34,687.72/47,869.18 = 18,772.18/x
  3. Step 3: Cross multiply
    34,687.72x = 47,869.18 × 18,772.18
  4. Step 4: Simplify right side
    34,687.72x = 898,608,863.41
  5. Step 5: Solve for x
    x = 898,608,863.41/34,687.72
  6. Step 6: Final answer
    x = 25,905.68

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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.