Home / 10,921.55-16,382.61-3,130.34

Finding the Fourth Proportional to 10,921.55, 16,382.61 and 3,130.34

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Solution

The fourth proportional to 10,921.55, 16,382.61 and 3,130.34 is: 4,695.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,921.55 : 16,382.61 = 3,130.34 : x
  2. Step 2: Convert to fraction form
    10,921.55/16,382.61 = 3,130.34/x
  3. Step 3: Cross multiply
    10,921.55x = 16,382.61 × 3,130.34
  4. Step 4: Simplify right side
    10,921.55x = 51,283,057.47
  5. Step 5: Solve for x
    x = 51,283,057.47/10,921.55
  6. Step 6: Final answer
    x = 4,695.59

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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.