Home / 13,111.20-18,051.66-12,216.96

Finding the Fourth Proportional to 13,111.20, 18,051.66 and 12,216.96

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Solution

The fourth proportional to 13,111.20, 18,051.66 and 12,216.96 is: 16,820.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,111.20 : 18,051.66 = 12,216.96 : x
  2. Step 2: Convert to fraction form
    13,111.20/18,051.66 = 12,216.96/x
  3. Step 3: Cross multiply
    13,111.20x = 18,051.66 × 12,216.96
  4. Step 4: Simplify right side
    13,111.20x = 220,536,408.15
  5. Step 5: Solve for x
    x = 220,536,408.15/13,111.20
  6. Step 6: Final answer
    x = 16,820.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.