Home / 8,190.30-12,261.15-5,420.10

Finding the Fourth Proportional to 8,190.30, 12,261.15 and 5,420.10

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Solution

The fourth proportional to 8,190.30, 12,261.15 and 5,420.10 is: 8,114.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,190.30 : 12,261.15 = 5,420.10 : x
  2. Step 2: Convert to fraction form
    8,190.30/12,261.15 = 5,420.10/x
  3. Step 3: Cross multiply
    8,190.30x = 12,261.15 × 5,420.10
  4. Step 4: Simplify right side
    8,190.30x = 66,456,659.12
  5. Step 5: Solve for x
    x = 66,456,659.12/8,190.30
  6. Step 6: Final answer
    x = 8,114.07

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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.