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Finding the Fourth Proportional to 18,851.81, 28,410.11 and 16,980.04

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Solution

The fourth proportional to 18,851.81, 28,410.11 and 16,980.04 is: 25,589.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,851.81 : 28,410.11 = 16,980.04 : x
  2. Step 2: Convert to fraction form
    18,851.81/28,410.11 = 16,980.04/x
  3. Step 3: Cross multiply
    18,851.81x = 28,410.11 × 16,980.04
  4. Step 4: Simplify right side
    18,851.81x = 482,404,846.65
  5. Step 5: Solve for x
    x = 482,404,846.65/18,851.81
  6. Step 6: Final answer
    x = 25,589.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.