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Finding the Fourth Proportional to 12,565.99, 18,845.74 and 3,798.55

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Solution

The fourth proportional to 12,565.99, 18,845.74 and 3,798.55 is: 5,696.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,565.99 : 18,845.74 = 3,798.55 : x
  2. Step 2: Convert to fraction form
    12,565.99/18,845.74 = 3,798.55/x
  3. Step 3: Cross multiply
    12,565.99x = 18,845.74 × 3,798.55
  4. Step 4: Simplify right side
    12,565.99x = 71,586,485.68
  5. Step 5: Solve for x
    x = 71,586,485.68/12,565.99
  6. Step 6: Final answer
    x = 5,696.84

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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.