Home / 27,853.97-38,440.31-15,278.72

Finding the Fourth Proportional to 27,853.97, 38,440.31 and 15,278.72

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Solution

The fourth proportional to 27,853.97, 38,440.31 and 15,278.72 is: 21,085.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,853.97 : 38,440.31 = 15,278.72 : x
  2. Step 2: Convert to fraction form
    27,853.97/38,440.31 = 15,278.72/x
  3. Step 3: Cross multiply
    27,853.97x = 38,440.31 × 15,278.72
  4. Step 4: Simplify right side
    27,853.97x = 587,318,656.81
  5. Step 5: Solve for x
    x = 587,318,656.81/27,853.97
  6. Step 6: Final answer
    x = 21,085.64

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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.