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Finding the Fourth Proportional to 19,101.85, 28,651.07 and 6,621.60

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Solution

The fourth proportional to 19,101.85, 28,651.07 and 6,621.60 is: 9,931.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,101.85 : 28,651.07 = 6,621.60 : x
  2. Step 2: Convert to fraction form
    19,101.85/28,651.07 = 6,621.60/x
  3. Step 3: Cross multiply
    19,101.85x = 28,651.07 × 6,621.60
  4. Step 4: Simplify right side
    19,101.85x = 189,715,850.70
  5. Step 5: Solve for x
    x = 189,715,850.70/19,101.85
  6. Step 6: Final answer
    x = 9,931.80

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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.