Home / 20,359.31-30,519.81-10,985.28

Finding the Fourth Proportional to 20,359.31, 30,519.81 and 10,985.28

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Solution

The fourth proportional to 20,359.31, 30,519.81 and 10,985.28 is: 16,467.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,359.31 : 30,519.81 = 10,985.28 : x
  2. Step 2: Convert to fraction form
    20,359.31/30,519.81 = 10,985.28/x
  3. Step 3: Cross multiply
    20,359.31x = 30,519.81 × 10,985.28
  4. Step 4: Simplify right side
    20,359.31x = 335,268,543.95
  5. Step 5: Solve for x
    x = 335,268,543.95/20,359.31
  6. Step 6: Final answer
    x = 16,467.58

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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.