Home / 8,190.90-12,301.20-7,170.30

Finding the Fourth Proportional to 8,190.90, 12,301.20 and 7,170.30

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Solution

The fourth proportional to 8,190.90, 12,301.20 and 7,170.30 is: 10,768.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,190.90 : 12,301.20 = 7,170.30 : x
  2. Step 2: Convert to fraction form
    8,190.90/12,301.20 = 7,170.30/x
  3. Step 3: Cross multiply
    8,190.90x = 12,301.20 × 7,170.30
  4. Step 4: Simplify right side
    8,190.90x = 88,203,294.36
  5. Step 5: Solve for x
    x = 88,203,294.36/8,190.90
  6. Step 6: Final answer
    x = 10,768.45

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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.