Home / 11,212.40-16,818.60-3,420.20

Finding the Fourth Proportional to 11,212.40, 16,818.60 and 3,420.20

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Solution

The fourth proportional to 11,212.40, 16,818.60 and 3,420.20 is: 5,130.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,212.40 : 16,818.60 = 3,420.20 : x
  2. Step 2: Convert to fraction form
    11,212.40/16,818.60 = 3,420.20/x
  3. Step 3: Cross multiply
    11,212.40x = 16,818.60 × 3,420.20
  4. Step 4: Simplify right side
    11,212.40x = 57,522,975.72
  5. Step 5: Solve for x
    x = 57,522,975.72/11,212.40
  6. Step 6: Final answer
    x = 5,130.30

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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.