Home / 27,619.80-38,113-15,519.36

Finding the Fourth Proportional to 27,619.80, 38,113 and 15,519.36

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Solution

The fourth proportional to 27,619.80, 38,113 and 15,519.36 is: 21,415.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,619.80 : 38,113 = 15,519.36 : x
  2. Step 2: Convert to fraction form
    27,619.80/38,113 = 15,519.36/x
  3. Step 3: Cross multiply
    27,619.80x = 38,113 × 15,519.36
  4. Step 4: Simplify right side
    27,619.80x = 591,489,367.68
  5. Step 5: Solve for x
    x = 591,489,367.68/27,619.80
  6. Step 6: Final answer
    x = 21,415.41

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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.