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Finding the Fourth Proportional to 18,344.81, 25,315.88 and 9,961.31

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Solution

The fourth proportional to 18,344.81, 25,315.88 and 9,961.31 is: 13,746.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,344.81 : 25,315.88 = 9,961.31 : x
  2. Step 2: Convert to fraction form
    18,344.81/25,315.88 = 9,961.31/x
  3. Step 3: Cross multiply
    18,344.81x = 25,315.88 × 9,961.31
  4. Step 4: Simplify right side
    18,344.81x = 252,179,342.09
  5. Step 5: Solve for x
    x = 252,179,342.09/18,344.81
  6. Step 6: Final answer
    x = 13,746.63

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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.