Home / 20,941.92-31,412.80-5,359.52

Finding the Fourth Proportional to 20,941.92, 31,412.80 and 5,359.52

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Solution

The fourth proportional to 20,941.92, 31,412.80 and 5,359.52 is: 8,039.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,941.92 : 31,412.80 = 5,359.52 : x
  2. Step 2: Convert to fraction form
    20,941.92/31,412.80 = 5,359.52/x
  3. Step 3: Cross multiply
    20,941.92x = 31,412.80 × 5,359.52
  4. Step 4: Simplify right side
    20,941.92x = 168,357,529.86
  5. Step 5: Solve for x
    x = 168,357,529.86/20,941.92
  6. Step 6: Final answer
    x = 8,039.26

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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.