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Finding the Fourth Proportional to 5,611.99, 8,420.15 and 2,148.43

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Solution

The fourth proportional to 5,611.99, 8,420.15 and 2,148.43 is: 3,223.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,611.99 : 8,420.15 = 2,148.43 : x
  2. Step 2: Convert to fraction form
    5,611.99/8,420.15 = 2,148.43/x
  3. Step 3: Cross multiply
    5,611.99x = 8,420.15 × 2,148.43
  4. Step 4: Simplify right side
    5,611.99x = 18,090,102.86
  5. Step 5: Solve for x
    x = 18,090,102.86/5,611.99
  6. Step 6: Final answer
    x = 3,223.47

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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.