Home / 20,903.24-31,354.86-5,320.82

Finding the Fourth Proportional to 20,903.24, 31,354.86 and 5,320.82

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Solution

The fourth proportional to 20,903.24, 31,354.86 and 5,320.82 is: 7,981.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,903.24 : 31,354.86 = 5,320.82 : x
  2. Step 2: Convert to fraction form
    20,903.24/31,354.86 = 5,320.82/x
  3. Step 3: Cross multiply
    20,903.24x = 31,354.86 × 5,320.82
  4. Step 4: Simplify right side
    20,903.24x = 166,833,409.41
  5. Step 5: Solve for x
    x = 166,833,409.41/20,903.24
  6. Step 6: Final answer
    x = 7,981.22

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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.