Home / 20,231.05-27,918.74-11,278.63

Finding the Fourth Proportional to 20,231.05, 27,918.74 and 11,278.63

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Solution

The fourth proportional to 20,231.05, 27,918.74 and 11,278.63 is: 15,564.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,231.05 : 27,918.74 = 11,278.63 : x
  2. Step 2: Convert to fraction form
    20,231.05/27,918.74 = 11,278.63/x
  3. Step 3: Cross multiply
    20,231.05x = 27,918.74 × 11,278.63
  4. Step 4: Simplify right side
    20,231.05x = 314,885,138.53
  5. Step 5: Solve for x
    x = 314,885,138.53/20,231.05
  6. Step 6: Final answer
    x = 15,564.45

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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.