Home / 12,420.72-18,627.12-4,099.18

Finding the Fourth Proportional to 12,420.72, 18,627.12 and 4,099.18

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Solution

The fourth proportional to 12,420.72, 18,627.12 and 4,099.18 is: 6,147.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,420.72 : 18,627.12 = 4,099.18 : x
  2. Step 2: Convert to fraction form
    12,420.72/18,627.12 = 4,099.18/x
  3. Step 3: Cross multiply
    12,420.72x = 18,627.12 × 4,099.18
  4. Step 4: Simplify right side
    12,420.72x = 76,355,814.38
  5. Step 5: Solve for x
    x = 76,355,814.38/12,420.72
  6. Step 6: Final answer
    x = 6,147.46

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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.