Home / 13,518.88-18,656.05-8,212.67

Finding the Fourth Proportional to 13,518.88, 18,656.05 and 8,212.67

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Solution

The fourth proportional to 13,518.88, 18,656.05 and 8,212.67 is: 11,333.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,518.88 : 18,656.05 = 8,212.67 : x
  2. Step 2: Convert to fraction form
    13,518.88/18,656.05 = 8,212.67/x
  3. Step 3: Cross multiply
    13,518.88x = 18,656.05 × 8,212.67
  4. Step 4: Simplify right side
    13,518.88x = 153,215,982.15
  5. Step 5: Solve for x
    x = 153,215,982.15/13,518.88
  6. Step 6: Final answer
    x = 11,333.48

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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.