Home / 8,128.19-12,192.29-3,200.15

Finding the Fourth Proportional to 8,128.19, 12,192.29 and 3,200.15

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Solution

The fourth proportional to 8,128.19, 12,192.29 and 3,200.15 is: 4,800.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.19 : 12,192.29 = 3,200.15 : x
  2. Step 2: Convert to fraction form
    8,128.19/12,192.29 = 3,200.15/x
  3. Step 3: Cross multiply
    8,128.19x = 12,192.29 × 3,200.15
  4. Step 4: Simplify right side
    8,128.19x = 39,017,140.84
  5. Step 5: Solve for x
    x = 39,017,140.84/8,128.19
  6. Step 6: Final answer
    x = 4,800.23

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Similar ratio
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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.