Home / 20,621.49-28,458.17-11,190.03

Finding the Fourth Proportional to 20,621.49, 28,458.17 and 11,190.03

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Solution

The fourth proportional to 20,621.49, 28,458.17 and 11,190.03 is: 15,442.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,621.49 : 28,458.17 = 11,190.03 : x
  2. Step 2: Convert to fraction form
    20,621.49/28,458.17 = 11,190.03/x
  3. Step 3: Cross multiply
    20,621.49x = 28,458.17 × 11,190.03
  4. Step 4: Simplify right side
    20,621.49x = 318,447,776.05
  5. Step 5: Solve for x
    x = 318,447,776.05/20,621.49
  6. Step 6: Final answer
    x = 15,442.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.