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Finding the Fourth Proportional to 21,410.58, 32,118.93 and 6,620.64

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Solution

The fourth proportional to 21,410.58, 32,118.93 and 6,620.64 is: 9,931.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,410.58 : 32,118.93 = 6,620.64 : x
  2. Step 2: Convert to fraction form
    21,410.58/32,118.93 = 6,620.64/x
  3. Step 3: Cross multiply
    21,410.58x = 32,118.93 × 6,620.64
  4. Step 4: Simplify right side
    21,410.58x = 212,647,752.27
  5. Step 5: Solve for x
    x = 212,647,752.27/21,410.58
  6. Step 6: Final answer
    x = 9,931.90

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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.