Home / 20,929.59-31,399.38-6,889.86

Finding the Fourth Proportional to 20,929.59, 31,399.38 and 6,889.86

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Solution

The fourth proportional to 20,929.59, 31,399.38 and 6,889.86 is: 10,336.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.59 : 31,399.38 = 6,889.86 : x
  2. Step 2: Convert to fraction form
    20,929.59/31,399.38 = 6,889.86/x
  3. Step 3: Cross multiply
    20,929.59x = 31,399.38 × 6,889.86
  4. Step 4: Simplify right side
    20,929.59x = 216,337,332.29
  5. Step 5: Solve for x
    x = 216,337,332.29/20,929.59
  6. Step 6: Final answer
    x = 10,336.43

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1.5x scale

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.