Home / 20,511.76-30,730.56-9,427.72

Finding the Fourth Proportional to 20,511.76, 30,730.56 and 9,427.72

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Solution

The fourth proportional to 20,511.76, 30,730.56 and 9,427.72 is: 14,124.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.76 : 30,730.56 = 9,427.72 : x
  2. Step 2: Convert to fraction form
    20,511.76/30,730.56 = 9,427.72/x
  3. Step 3: Cross multiply
    20,511.76x = 30,730.56 × 9,427.72
  4. Step 4: Simplify right side
    20,511.76x = 289,719,115.12
  5. Step 5: Solve for x
    x = 289,719,115.12/20,511.76
  6. Step 6: Final answer
    x = 14,124.54

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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.