Home / 27,727.64-38,259.72-15,791.20

Finding the Fourth Proportional to 27,727.64, 38,259.72 and 15,791.20

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Solution

The fourth proportional to 27,727.64, 38,259.72 and 15,791.20 is: 21,789.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,727.64 : 38,259.72 = 15,791.20 : x
  2. Step 2: Convert to fraction form
    27,727.64/38,259.72 = 15,791.20/x
  3. Step 3: Cross multiply
    27,727.64x = 38,259.72 × 15,791.20
  4. Step 4: Simplify right side
    27,727.64x = 604,166,890.46
  5. Step 5: Solve for x
    x = 604,166,890.46/27,727.64
  6. Step 6: Final answer
    x = 21,789.34

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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.