Home / 20,211.17-27,881.76-15,704.09

Finding the Fourth Proportional to 20,211.17, 27,881.76 and 15,704.09

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Solution

The fourth proportional to 20,211.17, 27,881.76 and 15,704.09 is: 21,664.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,211.17 : 27,881.76 = 15,704.09 : x
  2. Step 2: Convert to fraction form
    20,211.17/27,881.76 = 15,704.09/x
  3. Step 3: Cross multiply
    20,211.17x = 27,881.76 × 15,704.09
  4. Step 4: Simplify right side
    20,211.17x = 437,857,668.40
  5. Step 5: Solve for x
    x = 437,857,668.40/20,211.17
  6. Step 6: Final answer
    x = 21,664.14

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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.