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Finding the Fourth Proportional to 18,339, 25,314.38 and 10,887

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Solution

The fourth proportional to 18,339, 25,314.38 and 10,887 is: 15,027.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,339 : 25,314.38 = 10,887 : x
  2. Step 2: Convert to fraction form
    18,339/25,314.38 = 10,887/x
  3. Step 3: Cross multiply
    18,339x = 25,314.38 × 10,887
  4. Step 4: Simplify right side
    18,339x = 275,597,655.06
  5. Step 5: Solve for x
    x = 275,597,655.06/18,339
  6. Step 6: Final answer
    x = 15,027.95

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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.