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Finding the Fourth Proportional to 20,651.53, 30,977.34 and 19,599.76

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Solution

The fourth proportional to 20,651.53, 30,977.34 and 19,599.76 is: 29,399.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,651.53 : 30,977.34 = 19,599.76 : x
  2. Step 2: Convert to fraction form
    20,651.53/30,977.34 = 19,599.76/x
  3. Step 3: Cross multiply
    20,651.53x = 30,977.34 × 19,599.76
  4. Step 4: Simplify right side
    20,651.53x = 607,148,429.44
  5. Step 5: Solve for x
    x = 607,148,429.44/20,651.53
  6. Step 6: Final answer
    x = 29,399.68

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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.