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Finding the Fourth Proportional to 18,812.66, 25,961.36 and 10,315.16

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Solution

The fourth proportional to 18,812.66, 25,961.36 and 10,315.16 is: 14,234.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,812.66 : 25,961.36 = 10,315.16 : x
  2. Step 2: Convert to fraction form
    18,812.66/25,961.36 = 10,315.16/x
  3. Step 3: Cross multiply
    18,812.66x = 25,961.36 × 10,315.16
  4. Step 4: Simplify right side
    18,812.66x = 267,795,582.22
  5. Step 5: Solve for x
    x = 267,795,582.22/18,812.66
  6. Step 6: Final answer
    x = 14,234.86

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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.