Home / 8,436.78-12,656.64-2,890.68

Finding the Fourth Proportional to 8,436.78, 12,656.64 and 2,890.68

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Solution

The fourth proportional to 8,436.78, 12,656.64 and 2,890.68 is: 4,336.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,436.78 : 12,656.64 = 2,890.68 : x
  2. Step 2: Convert to fraction form
    8,436.78/12,656.64 = 2,890.68/x
  3. Step 3: Cross multiply
    8,436.78x = 12,656.64 × 2,890.68
  4. Step 4: Simplify right side
    8,436.78x = 36,586,296.12
  5. Step 5: Solve for x
    x = 36,586,296.12/8,436.78
  6. Step 6: Final answer
    x = 4,336.52

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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.