Home / 20,881.55-28,817.91-11,450.11

Finding the Fourth Proportional to 20,881.55, 28,817.91 and 11,450.11

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Solution

The fourth proportional to 20,881.55, 28,817.91 and 11,450.11 is: 15,801.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.55 : 28,817.91 = 11,450.11 : x
  2. Step 2: Convert to fraction form
    20,881.55/28,817.91 = 11,450.11/x
  3. Step 3: Cross multiply
    20,881.55x = 28,817.91 × 11,450.11
  4. Step 4: Simplify right side
    20,881.55x = 329,968,221.46
  5. Step 5: Solve for x
    x = 329,968,221.46/20,881.55
  6. Step 6: Final answer
    x = 15,801.91

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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.