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Finding the Fourth Proportional to 18,462.94, 25,478.75 and 10,505.09

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Solution

The fourth proportional to 18,462.94, 25,478.75 and 10,505.09 is: 14,496.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,462.94 : 25,478.75 = 10,505.09 : x
  2. Step 2: Convert to fraction form
    18,462.94/25,478.75 = 10,505.09/x
  3. Step 3: Cross multiply
    18,462.94x = 25,478.75 × 10,505.09
  4. Step 4: Simplify right side
    18,462.94x = 267,656,651.80
  5. Step 5: Solve for x
    x = 267,656,651.80/18,462.94
  6. Step 6: Final answer
    x = 14,496.97

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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.