Home / 19,578.89-27,018.80-11,080.78

Finding the Fourth Proportional to 19,578.89, 27,018.80 and 11,080.78

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Solution

The fourth proportional to 19,578.89, 27,018.80 and 11,080.78 is: 15,291.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,578.89 : 27,018.80 = 11,080.78 : x
  2. Step 2: Convert to fraction form
    19,578.89/27,018.80 = 11,080.78/x
  3. Step 3: Cross multiply
    19,578.89x = 27,018.80 × 11,080.78
  4. Step 4: Simplify right side
    19,578.89x = 299,389,297.27
  5. Step 5: Solve for x
    x = 299,389,297.27/19,578.89
  6. Step 6: Final answer
    x = 15,291.43

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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.