Home / 21,939.99-32,913.41-7,145.46

Finding the Fourth Proportional to 21,939.99, 32,913.41 and 7,145.46

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Solution

The fourth proportional to 21,939.99, 32,913.41 and 7,145.46 is: 10,719.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,939.99 : 32,913.41 = 7,145.46 : x
  2. Step 2: Convert to fraction form
    21,939.99/32,913.41 = 7,145.46/x
  3. Step 3: Cross multiply
    21,939.99x = 32,913.41 × 7,145.46
  4. Step 4: Simplify right side
    21,939.99x = 235,181,418.89
  5. Step 5: Solve for x
    x = 235,181,418.89/21,939.99
  6. Step 6: Final answer
    x = 10,719.30

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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.