Home / 11,687.57-16,128.76-6,382.38

Finding the Fourth Proportional to 11,687.57, 16,128.76 and 6,382.38

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Solution

The fourth proportional to 11,687.57, 16,128.76 and 6,382.38 is: 8,807.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,687.57 : 16,128.76 = 6,382.38 : x
  2. Step 2: Convert to fraction form
    11,687.57/16,128.76 = 6,382.38/x
  3. Step 3: Cross multiply
    11,687.57x = 16,128.76 × 6,382.38
  4. Step 4: Simplify right side
    11,687.57x = 102,939,875.25
  5. Step 5: Solve for x
    x = 102,939,875.25/11,687.57
  6. Step 6: Final answer
    x = 8,807.64

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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.