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Finding the Fourth Proportional to 18,957.86, 28,436.79 and 6,477.99

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Solution

The fourth proportional to 18,957.86, 28,436.79 and 6,477.99 is: 9,716.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,957.86 : 28,436.79 = 6,477.99 : x
  2. Step 2: Convert to fraction form
    18,957.86/28,436.79 = 6,477.99/x
  3. Step 3: Cross multiply
    18,957.86x = 28,436.79 × 6,477.99
  4. Step 4: Simplify right side
    18,957.86x = 184,213,241.25
  5. Step 5: Solve for x
    x = 184,213,241.25/18,957.86
  6. Step 6: Final answer
    x = 9,716.99

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.