Home / 19,971.78-27,561.15-11,019.28

Finding the Fourth Proportional to 19,971.78, 27,561.15 and 11,019.28

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Solution

The fourth proportional to 19,971.78, 27,561.15 and 11,019.28 is: 15,206.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,971.78 : 27,561.15 = 11,019.28 : x
  2. Step 2: Convert to fraction form
    19,971.78/27,561.15 = 11,019.28/x
  3. Step 3: Cross multiply
    19,971.78x = 27,561.15 × 11,019.28
  4. Step 4: Simplify right side
    19,971.78x = 303,704,028.97
  5. Step 5: Solve for x
    x = 303,704,028.97/19,971.78
  6. Step 6: Final answer
    x = 15,206.66

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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.