Home / 12,928.14-17,835.21-8,145.18

Finding the Fourth Proportional to 12,928.14, 17,835.21 and 8,145.18

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Solution

The fourth proportional to 12,928.14, 17,835.21 and 8,145.18 is: 11,236.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,928.14 : 17,835.21 = 8,145.18 : x
  2. Step 2: Convert to fraction form
    12,928.14/17,835.21 = 8,145.18/x
  3. Step 3: Cross multiply
    12,928.14x = 17,835.21 × 8,145.18
  4. Step 4: Simplify right side
    12,928.14x = 145,270,995.79
  5. Step 5: Solve for x
    x = 145,270,995.79/12,928.14
  6. Step 6: Final answer
    x = 11,236.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.