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Finding the Fourth Proportional to 18,626.40, 25,704.42 and 10,242.90

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Solution

The fourth proportional to 18,626.40, 25,704.42 and 10,242.90 is: 14,135.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,626.40 : 25,704.42 = 10,242.90 : x
  2. Step 2: Convert to fraction form
    18,626.40/25,704.42 = 10,242.90/x
  3. Step 3: Cross multiply
    18,626.40x = 25,704.42 × 10,242.90
  4. Step 4: Simplify right side
    18,626.40x = 263,287,803.62
  5. Step 5: Solve for x
    x = 263,287,803.62/18,626.40
  6. Step 6: Final answer
    x = 14,135.20

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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.