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Finding the Fourth Proportional to 18,887.35, 26,064.43 and 10,390

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Solution

The fourth proportional to 18,887.35, 26,064.43 and 10,390 is: 14,338.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,887.35 : 26,064.43 = 10,390 : x
  2. Step 2: Convert to fraction form
    18,887.35/26,064.43 = 10,390/x
  3. Step 3: Cross multiply
    18,887.35x = 26,064.43 × 10,390
  4. Step 4: Simplify right side
    18,887.35x = 270,809,427.70
  5. Step 5: Solve for x
    x = 270,809,427.70/18,887.35
  6. Step 6: Final answer
    x = 14,338.14

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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.