Home / 13,727.48-18,945.09-7,760.21

Finding the Fourth Proportional to 13,727.48, 18,945.09 and 7,760.21

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Solution

The fourth proportional to 13,727.48, 18,945.09 and 7,760.21 is: 10,709.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,727.48 : 18,945.09 = 7,760.21 : x
  2. Step 2: Convert to fraction form
    13,727.48/18,945.09 = 7,760.21/x
  3. Step 3: Cross multiply
    13,727.48x = 18,945.09 × 7,760.21
  4. Step 4: Simplify right side
    13,727.48x = 147,017,782.14
  5. Step 5: Solve for x
    x = 147,017,782.14/13,727.48
  6. Step 6: Final answer
    x = 10,709.75

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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.