Home / 20,940.20-31,410.30-9,247.40

Finding the Fourth Proportional to 20,940.20, 31,410.30 and 9,247.40

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Solution

The fourth proportional to 20,940.20, 31,410.30 and 9,247.40 is: 13,871.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.20 : 31,410.30 = 9,247.40 : x
  2. Step 2: Convert to fraction form
    20,940.20/31,410.30 = 9,247.40/x
  3. Step 3: Cross multiply
    20,940.20x = 31,410.30 × 9,247.40
  4. Step 4: Simplify right side
    20,940.20x = 290,463,608.22
  5. Step 5: Solve for x
    x = 290,463,608.22/20,940.20
  6. Step 6: Final answer
    x = 13,871.10

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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.