Home / 20,767.65-28,659.40-11,336.21

Finding the Fourth Proportional to 20,767.65, 28,659.40 and 11,336.21

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Solution

The fourth proportional to 20,767.65, 28,659.40 and 11,336.21 is: 15,643.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,767.65 : 28,659.40 = 11,336.21 : x
  2. Step 2: Convert to fraction form
    20,767.65/28,659.40 = 11,336.21/x
  3. Step 3: Cross multiply
    20,767.65x = 28,659.40 × 11,336.21
  4. Step 4: Simplify right side
    20,767.65x = 324,888,976.87
  5. Step 5: Solve for x
    x = 324,888,976.87/20,767.65
  6. Step 6: Final answer
    x = 15,643.99

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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.