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Finding the Fourth Proportional to 19,194.40, 28,775.60 and 8,109.60

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Solution

The fourth proportional to 19,194.40, 28,775.60 and 8,109.60 is: 12,157.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,194.40 : 28,775.60 = 8,109.60 : x
  2. Step 2: Convert to fraction form
    19,194.40/28,775.60 = 8,109.60/x
  3. Step 3: Cross multiply
    19,194.40x = 28,775.60 × 8,109.60
  4. Step 4: Simplify right side
    19,194.40x = 233,358,605.76
  5. Step 5: Solve for x
    x = 233,358,605.76/19,194.40
  6. Step 6: Final answer
    x = 12,157.64

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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.