Home / 20,881.62-28,818.09-11,450.79

Finding the Fourth Proportional to 20,881.62, 28,818.09 and 11,450.79

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Solution

The fourth proportional to 20,881.62, 28,818.09 and 11,450.79 is: 15,802.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.62 : 28,818.09 = 11,450.79 : x
  2. Step 2: Convert to fraction form
    20,881.62/28,818.09 = 11,450.79/x
  3. Step 3: Cross multiply
    20,881.62x = 28,818.09 × 11,450.79
  4. Step 4: Simplify right side
    20,881.62x = 329,989,896.79
  5. Step 5: Solve for x
    x = 329,989,896.79/20,881.62
  6. Step 6: Final answer
    x = 15,802.89

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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.