Home / 27,643.88-38,147.12-15,705.56

Finding the Fourth Proportional to 27,643.88, 38,147.12 and 15,705.56

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Solution

The fourth proportional to 27,643.88, 38,147.12 and 15,705.56 is: 21,672.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,643.88 : 38,147.12 = 15,705.56 : x
  2. Step 2: Convert to fraction form
    27,643.88/38,147.12 = 15,705.56/x
  3. Step 3: Cross multiply
    27,643.88x = 38,147.12 × 15,705.56
  4. Step 4: Simplify right side
    27,643.88x = 599,121,957.72
  5. Step 5: Solve for x
    x = 599,121,957.72/27,643.88
  6. Step 6: Final answer
    x = 21,672.86

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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.