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Finding the Fourth Proportional to 18,772.53, 25,905.74 and 10,389.03

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Solution

The fourth proportional to 18,772.53, 25,905.74 and 10,389.03 is: 14,336.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,772.53 : 25,905.74 = 10,389.03 : x
  2. Step 2: Convert to fraction form
    18,772.53/25,905.74 = 10,389.03/x
  3. Step 3: Cross multiply
    18,772.53x = 25,905.74 × 10,389.03
  4. Step 4: Simplify right side
    18,772.53x = 269,135,458.09
  5. Step 5: Solve for x
    x = 269,135,458.09/18,772.53
  6. Step 6: Final answer
    x = 14,336.66

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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.