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Finding the Fourth Proportional to 16,782.90, 25,145.55 and 7,998.90

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Solution

The fourth proportional to 16,782.90, 25,145.55 and 7,998.90 is: 11,984.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,782.90 : 25,145.55 = 7,998.90 : x
  2. Step 2: Convert to fraction form
    16,782.90/25,145.55 = 7,998.90/x
  3. Step 3: Cross multiply
    16,782.90x = 25,145.55 × 7,998.90
  4. Step 4: Simplify right side
    16,782.90x = 201,136,739.90
  5. Step 5: Solve for x
    x = 201,136,739.90/16,782.90
  6. Step 6: Final answer
    x = 11,984.62

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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.