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Finding the Fourth Proportional to 20,356.84, 28,092.18 and 11,404.18

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Solution

The fourth proportional to 20,356.84, 28,092.18 and 11,404.18 is: 15,737.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,356.84 : 28,092.18 = 11,404.18 : x
  2. Step 2: Convert to fraction form
    20,356.84/28,092.18 = 11,404.18/x
  3. Step 3: Cross multiply
    20,356.84x = 28,092.18 × 11,404.18
  4. Step 4: Simplify right side
    20,356.84x = 320,368,277.31
  5. Step 5: Solve for x
    x = 320,368,277.31/20,356.84
  6. Step 6: Final answer
    x = 15,737.62

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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.