Home / 20,930.22-31,387.57-6,886.15

Finding the Fourth Proportional to 20,930.22, 31,387.57 and 6,886.15

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Solution

The fourth proportional to 20,930.22, 31,387.57 and 6,886.15 is: 10,326.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.22 : 31,387.57 = 6,886.15 : x
  2. Step 2: Convert to fraction form
    20,930.22/31,387.57 = 6,886.15/x
  3. Step 3: Cross multiply
    20,930.22x = 31,387.57 × 6,886.15
  4. Step 4: Simplify right side
    20,930.22x = 216,139,419.47
  5. Step 5: Solve for x
    x = 216,139,419.47/20,930.22
  6. Step 6: Final answer
    x = 10,326.67

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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.