Home / 20,121.51-27,766.37-11,169.01

Finding the Fourth Proportional to 20,121.51, 27,766.37 and 11,169.01

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Solution

The fourth proportional to 20,121.51, 27,766.37 and 11,169.01 is: 15,412.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.51 : 27,766.37 = 11,169.01 : x
  2. Step 2: Convert to fraction form
    20,121.51/27,766.37 = 11,169.01/x
  3. Step 3: Cross multiply
    20,121.51x = 27,766.37 × 11,169.01
  4. Step 4: Simplify right side
    20,121.51x = 310,122,864.19
  5. Step 5: Solve for x
    x = 310,122,864.19/20,121.51
  6. Step 6: Final answer
    x = 15,412.50

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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.