Home / 20,930.06-31,388.42-6,886.86

Finding the Fourth Proportional to 20,930.06, 31,388.42 and 6,886.86

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Solution

The fourth proportional to 20,930.06, 31,388.42 and 6,886.86 is: 10,328.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.06 : 31,388.42 = 6,886.86 : x
  2. Step 2: Convert to fraction form
    20,930.06/31,388.42 = 6,886.86/x
  3. Step 3: Cross multiply
    20,930.06x = 31,388.42 × 6,886.86
  4. Step 4: Simplify right side
    20,930.06x = 216,167,654.16
  5. Step 5: Solve for x
    x = 216,167,654.16/20,930.06
  6. Step 6: Final answer
    x = 10,328.10

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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.