Home / 20,913.49-31,361.63-10,379.64

Finding the Fourth Proportional to 20,913.49, 31,361.63 and 10,379.64

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Solution

The fourth proportional to 20,913.49, 31,361.63 and 10,379.64 is: 15,565.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.49 : 31,361.63 = 10,379.64 : x
  2. Step 2: Convert to fraction form
    20,913.49/31,361.63 = 10,379.64/x
  3. Step 3: Cross multiply
    20,913.49x = 31,361.63 × 10,379.64
  4. Step 4: Simplify right side
    20,913.49x = 325,522,553.31
  5. Step 5: Solve for x
    x = 325,522,553.31/20,913.49
  6. Step 6: Final answer
    x = 15,565.19

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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.