Home / 20,881.76-28,816.80-11,450.32

Finding the Fourth Proportional to 20,881.76, 28,816.80 and 11,450.32

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Solution

The fourth proportional to 20,881.76, 28,816.80 and 11,450.32 is: 15,801.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.76 : 28,816.80 = 11,450.32 : x
  2. Step 2: Convert to fraction form
    20,881.76/28,816.80 = 11,450.32/x
  3. Step 3: Cross multiply
    20,881.76x = 28,816.80 × 11,450.32
  4. Step 4: Simplify right side
    20,881.76x = 329,961,581.38
  5. Step 5: Solve for x
    x = 329,961,581.38/20,881.76
  6. Step 6: Final answer
    x = 15,801.43

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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.