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Finding the Fourth Proportional to 19,074.54, 28,608.24 and 7,978.16

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Solution

The fourth proportional to 19,074.54, 28,608.24 and 7,978.16 is: 11,965.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,074.54 : 28,608.24 = 7,978.16 : x
  2. Step 2: Convert to fraction form
    19,074.54/28,608.24 = 7,978.16/x
  3. Step 3: Cross multiply
    19,074.54x = 28,608.24 × 7,978.16
  4. Step 4: Simplify right side
    19,074.54x = 228,241,116.04
  5. Step 5: Solve for x
    x = 228,241,116.04/19,074.54
  6. Step 6: Final answer
    x = 11,965.75

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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.