Home / 18,979.08-28,478.34-10,222.44

Finding the Fourth Proportional to 18,979.08, 28,478.34 and 10,222.44

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Solution

The fourth proportional to 18,979.08, 28,478.34 and 10,222.44 is: 15,338.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,979.08 : 28,478.34 = 10,222.44 : x
  2. Step 2: Convert to fraction form
    18,979.08/28,478.34 = 10,222.44/x
  3. Step 3: Cross multiply
    18,979.08x = 28,478.34 × 10,222.44
  4. Step 4: Simplify right side
    18,979.08x = 291,118,121.95
  5. Step 5: Solve for x
    x = 291,118,121.95/18,979.08
  6. Step 6: Final answer
    x = 15,338.90

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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.