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Finding the Fourth Proportional to 19,578.51, 27,018.51 and 11,080.65

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Solution

The fourth proportional to 19,578.51, 27,018.51 and 11,080.65 is: 15,291.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,578.51 : 27,018.51 = 11,080.65 : x
  2. Step 2: Convert to fraction form
    19,578.51/27,018.51 = 11,080.65/x
  3. Step 3: Cross multiply
    19,578.51x = 27,018.51 × 11,080.65
  4. Step 4: Simplify right side
    19,578.51x = 299,382,622.95
  5. Step 5: Solve for x
    x = 299,382,622.95/19,578.51
  6. Step 6: Final answer
    x = 15,291.39

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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.