Home / 27,979.78-38,610.93-15,403.72

Finding the Fourth Proportional to 27,979.78, 38,610.93 and 15,403.72

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Solution

The fourth proportional to 27,979.78, 38,610.93 and 15,403.72 is: 21,256.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,979.78 : 38,610.93 = 15,403.72 : x
  2. Step 2: Convert to fraction form
    27,979.78/38,610.93 = 15,403.72/x
  3. Step 3: Cross multiply
    27,979.78x = 38,610.93 × 15,403.72
  4. Step 4: Simplify right side
    27,979.78x = 594,751,954.66
  5. Step 5: Solve for x
    x = 594,751,954.66/27,979.78
  6. Step 6: Final answer
    x = 21,256.49

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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.