Home / 20,112.51-27,753.93-11,159.45

Finding the Fourth Proportional to 20,112.51, 27,753.93 and 11,159.45

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Solution

The fourth proportional to 20,112.51, 27,753.93 and 11,159.45 is: 15,399.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,112.51 : 27,753.93 = 11,159.45 : x
  2. Step 2: Convert to fraction form
    20,112.51/27,753.93 = 11,159.45/x
  3. Step 3: Cross multiply
    20,112.51x = 27,753.93 × 11,159.45
  4. Step 4: Simplify right side
    20,112.51x = 309,718,455.37
  5. Step 5: Solve for x
    x = 309,718,455.37/20,112.51
  6. Step 6: Final answer
    x = 15,399.29

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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.