Home / 20,930.52-31,392.32-6,890.74

Finding the Fourth Proportional to 20,930.52, 31,392.32 and 6,890.74

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Solution

The fourth proportional to 20,930.52, 31,392.32 and 6,890.74 is: 10,334.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.52 : 31,392.32 = 6,890.74 : x
  2. Step 2: Convert to fraction form
    20,930.52/31,392.32 = 6,890.74/x
  3. Step 3: Cross multiply
    20,930.52x = 31,392.32 × 6,890.74
  4. Step 4: Simplify right side
    20,930.52x = 216,316,315.12
  5. Step 5: Solve for x
    x = 216,316,315.12/20,930.52
  6. Step 6: Final answer
    x = 10,334.97

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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.