Home / 8,128.25-12,192.38-1,972.25

Finding the Fourth Proportional to 8,128.25, 12,192.38 and 1,972.25

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Solution

The fourth proportional to 8,128.25, 12,192.38 and 1,972.25 is: 2,958.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.25 : 12,192.38 = 1,972.25 : x
  2. Step 2: Convert to fraction form
    8,128.25/12,192.38 = 1,972.25/x
  3. Step 3: Cross multiply
    8,128.25x = 12,192.38 × 1,972.25
  4. Step 4: Simplify right side
    8,128.25x = 24,046,421.46
  5. Step 5: Solve for x
    x = 24,046,421.46/8,128.25
  6. Step 6: Final answer
    x = 2,958.38

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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.