Home / 13,188.78-18,200.55-7,220.49

Finding the Fourth Proportional to 13,188.78, 18,200.55 and 7,220.49

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Solution

The fourth proportional to 13,188.78, 18,200.55 and 7,220.49 is: 9,964.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,188.78 : 18,200.55 = 7,220.49 : x
  2. Step 2: Convert to fraction form
    13,188.78/18,200.55 = 7,220.49/x
  3. Step 3: Cross multiply
    13,188.78x = 18,200.55 × 7,220.49
  4. Step 4: Simplify right side
    13,188.78x = 131,416,889.27
  5. Step 5: Solve for x
    x = 131,416,889.27/13,188.78
  6. Step 6: Final answer
    x = 9,964.29

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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.