Home / 12,540.96-18,811.98-4,220.64

Finding the Fourth Proportional to 12,540.96, 18,811.98 and 4,220.64

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Solution

The fourth proportional to 12,540.96, 18,811.98 and 4,220.64 is: 6,331.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,540.96 : 18,811.98 = 4,220.64 : x
  2. Step 2: Convert to fraction form
    12,540.96/18,811.98 = 4,220.64/x
  3. Step 3: Cross multiply
    12,540.96x = 18,811.98 × 4,220.64
  4. Step 4: Simplify right side
    12,540.96x = 79,398,595.27
  5. Step 5: Solve for x
    x = 79,398,595.27/12,540.96
  6. Step 6: Final answer
    x = 6,331.14

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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.