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Finding the Fourth Proportional to 18,819.36, 25,970.88 and 11,745.36

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Solution

The fourth proportional to 18,819.36, 25,970.88 and 11,745.36 is: 16,208.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.36 : 25,970.88 = 11,745.36 : x
  2. Step 2: Convert to fraction form
    18,819.36/25,970.88 = 11,745.36/x
  3. Step 3: Cross multiply
    18,819.36x = 25,970.88 × 11,745.36
  4. Step 4: Simplify right side
    18,819.36x = 305,037,335.12
  5. Step 5: Solve for x
    x = 305,037,335.12/18,819.36
  6. Step 6: Final answer
    x = 16,208.70

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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.