Home / 13,188.81-18,200.57-7,220.85

Finding the Fourth Proportional to 13,188.81, 18,200.57 and 7,220.85

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Solution

The fourth proportional to 13,188.81, 18,200.57 and 7,220.85 is: 9,964.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,188.81 : 18,200.57 = 7,220.85 : x
  2. Step 2: Convert to fraction form
    13,188.81/18,200.57 = 7,220.85/x
  3. Step 3: Cross multiply
    13,188.81x = 18,200.57 × 7,220.85
  4. Step 4: Simplify right side
    13,188.81x = 131,423,585.88
  5. Step 5: Solve for x
    x = 131,423,585.88/13,188.81
  6. Step 6: Final answer
    x = 9,964.78

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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.