Home / 10,921.92-16,382.76-3,130.80

Finding the Fourth Proportional to 10,921.92, 16,382.76 and 3,130.80

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Solution

The fourth proportional to 10,921.92, 16,382.76 and 3,130.80 is: 4,696.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,921.92 : 16,382.76 = 3,130.80 : x
  2. Step 2: Convert to fraction form
    10,921.92/16,382.76 = 3,130.80/x
  3. Step 3: Cross multiply
    10,921.92x = 16,382.76 × 3,130.80
  4. Step 4: Simplify right side
    10,921.92x = 51,291,145.01
  5. Step 5: Solve for x
    x = 51,291,145.01/10,921.92
  6. Step 6: Final answer
    x = 4,696.17

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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.