Home / 19,987.14-27,578.80-11,487.28

Finding the Fourth Proportional to 19,987.14, 27,578.80 and 11,487.28

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Solution

The fourth proportional to 19,987.14, 27,578.80 and 11,487.28 is: 15,850.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,987.14 : 27,578.80 = 11,487.28 : x
  2. Step 2: Convert to fraction form
    19,987.14/27,578.80 = 11,487.28/x
  3. Step 3: Cross multiply
    19,987.14x = 27,578.80 × 11,487.28
  4. Step 4: Simplify right side
    19,987.14x = 316,805,397.66
  5. Step 5: Solve for x
    x = 316,805,397.66/19,987.14
  6. Step 6: Final answer
    x = 15,850.46

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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.