Home / 19,986.21-27,579.55-11,031.80

Finding the Fourth Proportional to 19,986.21, 27,579.55 and 11,031.80

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Solution

The fourth proportional to 19,986.21, 27,579.55 and 11,031.80 is: 15,223.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,986.21 : 27,579.55 = 11,031.80 : x
  2. Step 2: Convert to fraction form
    19,986.21/27,579.55 = 11,031.80/x
  3. Step 3: Cross multiply
    19,986.21x = 27,579.55 × 11,031.80
  4. Step 4: Simplify right side
    19,986.21x = 304,252,079.69
  5. Step 5: Solve for x
    x = 304,252,079.69/19,986.21
  6. Step 6: Final answer
    x = 15,223.10

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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.