Home / 12,128.36-18,193.28-3,808.68

Finding the Fourth Proportional to 12,128.36, 18,193.28 and 3,808.68

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Solution

The fourth proportional to 12,128.36, 18,193.28 and 3,808.68 is: 5,713.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128.36 : 18,193.28 = 3,808.68 : x
  2. Step 2: Convert to fraction form
    12,128.36/18,193.28 = 3,808.68/x
  3. Step 3: Cross multiply
    12,128.36x = 18,193.28 × 3,808.68
  4. Step 4: Simplify right side
    12,128.36x = 69,292,381.67
  5. Step 5: Solve for x
    x = 69,292,381.67/12,128.36
  6. Step 6: Final answer
    x = 5,713.25

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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.