Home / 13,228.75-18,252.27-7,919.81

Finding the Fourth Proportional to 13,228.75, 18,252.27 and 7,919.81

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Solution

The fourth proportional to 13,228.75, 18,252.27 and 7,919.81 is: 10,927.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,228.75 : 18,252.27 = 7,919.81 : x
  2. Step 2: Convert to fraction form
    13,228.75/18,252.27 = 7,919.81/x
  3. Step 3: Cross multiply
    13,228.75x = 18,252.27 × 7,919.81
  4. Step 4: Simplify right side
    13,228.75x = 144,554,487.65
  5. Step 5: Solve for x
    x = 144,554,487.65/13,228.75
  6. Step 6: Final answer
    x = 10,927.30

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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.