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Finding the Fourth Proportional to 18,701.12, 25,809 and 10,319.12

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Solution

The fourth proportional to 18,701.12, 25,809 and 10,319.12 is: 14,241.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,701.12 : 25,809 = 10,319.12 : x
  2. Step 2: Convert to fraction form
    18,701.12/25,809 = 10,319.12/x
  3. Step 3: Cross multiply
    18,701.12x = 25,809 × 10,319.12
  4. Step 4: Simplify right side
    18,701.12x = 266,326,168.08
  5. Step 5: Solve for x
    x = 266,326,168.08/18,701.12
  6. Step 6: Final answer
    x = 14,241.19

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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.