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Finding the Fourth Proportional to 8,235.78, 12,355.20 and 2,899.50

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Solution

The fourth proportional to 8,235.78, 12,355.20 and 2,899.50 is: 4,349.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,235.78 : 12,355.20 = 2,899.50 : x
  2. Step 2: Convert to fraction form
    8,235.78/12,355.20 = 2,899.50/x
  3. Step 3: Cross multiply
    8,235.78x = 12,355.20 × 2,899.50
  4. Step 4: Simplify right side
    8,235.78x = 35,823,856.07
  5. Step 5: Solve for x
    x = 35,823,856.07/8,235.78
  6. Step 6: Final answer
    x = 4,349.79

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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.