Home / 27,786.70-38,346.04-15,687.87

Finding the Fourth Proportional to 27,786.70, 38,346.04 and 15,687.87

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Solution

The fourth proportional to 27,786.70, 38,346.04 and 15,687.87 is: 21,649.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,786.70 : 38,346.04 = 15,687.87 : x
  2. Step 2: Convert to fraction form
    27,786.70/38,346.04 = 15,687.87/x
  3. Step 3: Cross multiply
    27,786.70x = 38,346.04 × 15,687.87
  4. Step 4: Simplify right side
    27,786.70x = 601,567,690.53
  5. Step 5: Solve for x
    x = 601,567,690.53/27,786.70
  6. Step 6: Final answer
    x = 21,649.48

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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.