Home / 11,128.94-15,356.89-6,651.80

Finding the Fourth Proportional to 11,128.94, 15,356.89 and 6,651.80

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Solution

The fourth proportional to 11,128.94, 15,356.89 and 6,651.80 is: 9,178.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,128.94 : 15,356.89 = 6,651.80 : x
  2. Step 2: Convert to fraction form
    11,128.94/15,356.89 = 6,651.80/x
  3. Step 3: Cross multiply
    11,128.94x = 15,356.89 × 6,651.80
  4. Step 4: Simplify right side
    11,128.94x = 102,150,960.90
  5. Step 5: Solve for x
    x = 102,150,960.90/11,128.94
  6. Step 6: Final answer
    x = 9,178.86

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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.