Home / 20,186.88-27,857.16-11,803.20

Finding the Fourth Proportional to 20,186.88, 27,857.16 and 11,803.20

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Solution

The fourth proportional to 20,186.88, 27,857.16 and 11,803.20 is: 16,287.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,186.88 : 27,857.16 = 11,803.20 : x
  2. Step 2: Convert to fraction form
    20,186.88/27,857.16 = 11,803.20/x
  3. Step 3: Cross multiply
    20,186.88x = 27,857.16 × 11,803.20
  4. Step 4: Simplify right side
    20,186.88x = 328,803,630.91
  5. Step 5: Solve for x
    x = 328,803,630.91/20,186.88
  6. Step 6: Final answer
    x = 16,287.99

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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.