Home / 8,185.20-12,261.63-6,421.42

Finding the Fourth Proportional to 8,185.20, 12,261.63 and 6,421.42

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Solution

The fourth proportional to 8,185.20, 12,261.63 and 6,421.42 is: 9,619.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,185.20 : 12,261.63 = 6,421.42 : x
  2. Step 2: Convert to fraction form
    8,185.20/12,261.63 = 6,421.42/x
  3. Step 3: Cross multiply
    8,185.20x = 12,261.63 × 6,421.42
  4. Step 4: Simplify right side
    8,185.20x = 78,737,045.46
  5. Step 5: Solve for x
    x = 78,737,045.46/8,185.20
  6. Step 6: Final answer
    x = 9,619.44

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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.