Home / 27,653.40-38,163.96-15,720.48

Finding the Fourth Proportional to 27,653.40, 38,163.96 and 15,720.48

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Solution

The fourth proportional to 27,653.40, 38,163.96 and 15,720.48 is: 21,695.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,653.40 : 38,163.96 = 15,720.48 : x
  2. Step 2: Convert to fraction form
    27,653.40/38,163.96 = 15,720.48/x
  3. Step 3: Cross multiply
    27,653.40x = 38,163.96 × 15,720.48
  4. Step 4: Simplify right side
    27,653.40x = 599,955,769.90
  5. Step 5: Solve for x
    x = 599,955,769.90/27,653.40
  6. Step 6: Final answer
    x = 21,695.55

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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.