Home / 27,855.71-38,443.64-15,920.76

Finding the Fourth Proportional to 27,855.71, 38,443.64 and 15,920.76

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Solution

The fourth proportional to 27,855.71, 38,443.64 and 15,920.76 is: 21,972.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,855.71 : 38,443.64 = 15,920.76 : x
  2. Step 2: Convert to fraction form
    27,855.71/38,443.64 = 15,920.76/x
  3. Step 3: Cross multiply
    27,855.71x = 38,443.64 × 15,920.76
  4. Step 4: Simplify right side
    27,855.71x = 612,051,965.97
  5. Step 5: Solve for x
    x = 612,051,965.97/27,855.71
  6. Step 6: Final answer
    x = 21,972.23

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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.