Home / 12,128.25-18,192.35-3,808.91

Finding the Fourth Proportional to 12,128.25, 18,192.35 and 3,808.91

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Solution

The fourth proportional to 12,128.25, 18,192.35 and 3,808.91 is: 5,713.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128.25 : 18,192.35 = 3,808.91 : x
  2. Step 2: Convert to fraction form
    12,128.25/18,192.35 = 3,808.91/x
  3. Step 3: Cross multiply
    12,128.25x = 18,192.35 × 3,808.91
  4. Step 4: Simplify right side
    12,128.25x = 69,293,023.84
  5. Step 5: Solve for x
    x = 69,293,023.84/12,128.25
  6. Step 6: Final answer
    x = 5,713.36

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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.