Home / 20,881.69-28,816.73-11,450.45

Finding the Fourth Proportional to 20,881.69, 28,816.73 and 11,450.45

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Solution

The fourth proportional to 20,881.69, 28,816.73 and 11,450.45 is: 15,801.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.69 : 28,816.73 = 11,450.45 : x
  2. Step 2: Convert to fraction form
    20,881.69/28,816.73 = 11,450.45/x
  3. Step 3: Cross multiply
    20,881.69x = 28,816.73 × 11,450.45
  4. Step 4: Simplify right side
    20,881.69x = 329,964,648.17
  5. Step 5: Solve for x
    x = 329,964,648.17/20,881.69
  6. Step 6: Final answer
    x = 15,801.63

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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.