Home / 20,929.23-31,399.52-6,138.02

Finding the Fourth Proportional to 20,929.23, 31,399.52 and 6,138.02

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Solution

The fourth proportional to 20,929.23, 31,399.52 and 6,138.02 is: 9,208.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.23 : 31,399.52 = 6,138.02 : x
  2. Step 2: Convert to fraction form
    20,929.23/31,399.52 = 6,138.02/x
  3. Step 3: Cross multiply
    20,929.23x = 31,399.52 × 6,138.02
  4. Step 4: Simplify right side
    20,929.23x = 192,730,929.56
  5. Step 5: Solve for x
    x = 192,730,929.56/20,929.23
  6. Step 6: Final answer
    x = 9,208.70

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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.