Home / 20,399.26-28,152.42-11,325.10

Finding the Fourth Proportional to 20,399.26, 28,152.42 and 11,325.10

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Solution

The fourth proportional to 20,399.26, 28,152.42 and 11,325.10 is: 15,629.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,399.26 : 28,152.42 = 11,325.10 : x
  2. Step 2: Convert to fraction form
    20,399.26/28,152.42 = 11,325.10/x
  3. Step 3: Cross multiply
    20,399.26x = 28,152.42 × 11,325.10
  4. Step 4: Simplify right side
    20,399.26x = 318,828,971.74
  5. Step 5: Solve for x
    x = 318,828,971.74/20,399.26
  6. Step 6: Final answer
    x = 15,629.44

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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.