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Finding the Fourth Proportional to 18,813.69, 25,963.23 and 10,315.65

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Solution

The fourth proportional to 18,813.69, 25,963.23 and 10,315.65 is: 14,235.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,813.69 : 25,963.23 = 10,315.65 : x
  2. Step 2: Convert to fraction form
    18,813.69/25,963.23 = 10,315.65/x
  3. Step 3: Cross multiply
    18,813.69x = 25,963.23 × 10,315.65
  4. Step 4: Simplify right side
    18,813.69x = 267,827,593.55
  5. Step 5: Solve for x
    x = 267,827,593.55/18,813.69
  6. Step 6: Final answer
    x = 14,235.78

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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.