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Finding the Fourth Proportional to 20,599.25, 30,880.55 and 7,448.70

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Solution

The fourth proportional to 20,599.25, 30,880.55 and 7,448.70 is: 11,166.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,599.25 : 30,880.55 = 7,448.70 : x
  2. Step 2: Convert to fraction form
    20,599.25/30,880.55 = 7,448.70/x
  3. Step 3: Cross multiply
    20,599.25x = 30,880.55 × 7,448.70
  4. Step 4: Simplify right side
    20,599.25x = 230,019,952.79
  5. Step 5: Solve for x
    x = 230,019,952.79/20,599.25
  6. Step 6: Final answer
    x = 11,166.42

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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.