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Finding the Fourth Proportional to 18,251.29, 25,186.74 and 9,867.79

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Solution

The fourth proportional to 18,251.29, 25,186.74 and 9,867.79 is: 13,617.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,251.29 : 25,186.74 = 9,867.79 : x
  2. Step 2: Convert to fraction form
    18,251.29/25,186.74 = 9,867.79/x
  3. Step 3: Cross multiply
    18,251.29x = 25,186.74 × 9,867.79
  4. Step 4: Simplify right side
    18,251.29x = 248,537,461.10
  5. Step 5: Solve for x
    x = 248,537,461.10/18,251.29
  6. Step 6: Final answer
    x = 13,617.53

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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.