Home / 27,854.85-38,439.87-15,918.63

Finding the Fourth Proportional to 27,854.85, 38,439.87 and 15,918.63

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Solution

The fourth proportional to 27,854.85, 38,439.87 and 15,918.63 is: 21,967.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,854.85 : 38,439.87 = 15,918.63 : x
  2. Step 2: Convert to fraction form
    27,854.85/38,439.87 = 15,918.63/x
  3. Step 3: Cross multiply
    27,854.85x = 38,439.87 × 15,918.63
  4. Step 4: Simplify right side
    27,854.85x = 611,910,067.78
  5. Step 5: Solve for x
    x = 611,910,067.78/27,854.85
  6. Step 6: Final answer
    x = 21,967.81

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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.