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Finding the Fourth Proportional to 13,881.80, 20,922.62 and 11,957.24

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Solution

The fourth proportional to 13,881.80, 20,922.62 and 11,957.24 is: 18,021.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,881.80 : 20,922.62 = 11,957.24 : x
  2. Step 2: Convert to fraction form
    13,881.80/20,922.62 = 11,957.24/x
  3. Step 3: Cross multiply
    13,881.80x = 20,922.62 × 11,957.24
  4. Step 4: Simplify right side
    13,881.80x = 250,176,788.77
  5. Step 5: Solve for x
    x = 250,176,788.77/13,881.80
  6. Step 6: Final answer
    x = 18,021.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.