Home / 11,276.63-16,845.79-8,129.78

Finding the Fourth Proportional to 11,276.63, 16,845.79 and 8,129.78

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Solution

The fourth proportional to 11,276.63, 16,845.79 and 8,129.78 is: 12,144.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,276.63 : 16,845.79 = 8,129.78 : x
  2. Step 2: Convert to fraction form
    11,276.63/16,845.79 = 8,129.78/x
  3. Step 3: Cross multiply
    11,276.63x = 16,845.79 × 8,129.78
  4. Step 4: Simplify right side
    11,276.63x = 136,952,482.40
  5. Step 5: Solve for x
    x = 136,952,482.40/11,276.63
  6. Step 6: Final answer
    x = 12,144.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.