Home / 11,439.73-15,777.99-7,661.69

Finding the Fourth Proportional to 11,439.73, 15,777.99 and 7,661.69

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Solution

The fourth proportional to 11,439.73, 15,777.99 and 7,661.69 is: 10,567.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,439.73 : 15,777.99 = 7,661.69 : x
  2. Step 2: Convert to fraction form
    11,439.73/15,777.99 = 7,661.69/x
  3. Step 3: Cross multiply
    11,439.73x = 15,777.99 × 7,661.69
  4. Step 4: Simplify right side
    11,439.73x = 120,886,048.48
  5. Step 5: Solve for x
    x = 120,886,048.48/11,439.73
  6. Step 6: Final answer
    x = 10,567.21

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Half scale
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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.