Home / 18,989.12-28,467.20-10,662.32

Finding the Fourth Proportional to 18,989.12, 28,467.20 and 10,662.32

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Solution

The fourth proportional to 18,989.12, 28,467.20 and 10,662.32 is: 15,984.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,989.12 : 28,467.20 = 10,662.32 : x
  2. Step 2: Convert to fraction form
    18,989.12/28,467.20 = 10,662.32/x
  3. Step 3: Cross multiply
    18,989.12x = 28,467.20 × 10,662.32
  4. Step 4: Simplify right side
    18,989.12x = 303,526,395.90
  5. Step 5: Solve for x
    x = 303,526,395.90/18,989.12
  6. Step 6: Final answer
    x = 15,984.23

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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.