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Finding the Fourth Proportional to 25,647.20, 38,499.60 and 19,829.60

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Solution

The fourth proportional to 25,647.20, 38,499.60 and 19,829.60 is: 29,766.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,647.20 : 38,499.60 = 19,829.60 : x
  2. Step 2: Convert to fraction form
    25,647.20/38,499.60 = 19,829.60/x
  3. Step 3: Cross multiply
    25,647.20x = 38,499.60 × 19,829.60
  4. Step 4: Simplify right side
    25,647.20x = 763,431,668.16
  5. Step 5: Solve for x
    x = 763,431,668.16/25,647.20
  6. Step 6: Final answer
    x = 29,766.67

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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.