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Finding the Fourth Proportional to 19,078.60, 28,610.70 and 7,986.06

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Solution

The fourth proportional to 19,078.60, 28,610.70 and 7,986.06 is: 11,976.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,078.60 : 28,610.70 = 7,986.06 : x
  2. Step 2: Convert to fraction form
    19,078.60/28,610.70 = 7,986.06/x
  3. Step 3: Cross multiply
    19,078.60x = 28,610.70 × 7,986.06
  4. Step 4: Simplify right side
    19,078.60x = 228,486,766.84
  5. Step 5: Solve for x
    x = 228,486,766.84/19,078.60
  6. Step 6: Final answer
    x = 11,976.08

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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.