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Finding the Fourth Proportional to 18,671.96, 27,978.77 and 15,887.18

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Solution

The fourth proportional to 18,671.96, 27,978.77 and 15,887.18 is: 23,805.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,671.96 : 27,978.77 = 15,887.18 : x
  2. Step 2: Convert to fraction form
    18,671.96/27,978.77 = 15,887.18/x
  3. Step 3: Cross multiply
    18,671.96x = 27,978.77 × 15,887.18
  4. Step 4: Simplify right side
    18,671.96x = 444,503,535.84
  5. Step 5: Solve for x
    x = 444,503,535.84/18,671.96
  6. Step 6: Final answer
    x = 23,805.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.