Home / 8,160.90-12,256.20-7,140.30

Finding the Fourth Proportional to 8,160.90, 12,256.20 and 7,140.30

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Solution

The fourth proportional to 8,160.90, 12,256.20 and 7,140.30 is: 10,723.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,160.90 : 12,256.20 = 7,140.30 : x
  2. Step 2: Convert to fraction form
    8,160.90/12,256.20 = 7,140.30/x
  3. Step 3: Cross multiply
    8,160.90x = 12,256.20 × 7,140.30
  4. Step 4: Simplify right side
    8,160.90x = 87,512,944.86
  5. Step 5: Solve for x
    x = 87,512,944.86/8,160.90
  6. Step 6: Final answer
    x = 10,723.44

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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.