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Finding the Fourth Proportional to 13,188.46, 18,200.07 and 7,220.11

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Solution

The fourth proportional to 13,188.46, 18,200.07 and 7,220.11 is: 9,963.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,188.46 : 18,200.07 = 7,220.11 : x
  2. Step 2: Convert to fraction form
    13,188.46/18,200.07 = 7,220.11/x
  3. Step 3: Cross multiply
    13,188.46x = 18,200.07 × 7,220.11
  4. Step 4: Simplify right side
    13,188.46x = 131,406,461.91
  5. Step 5: Solve for x
    x = 131,406,461.91/13,188.46
  6. Step 6: Final answer
    x = 9,963.75

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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.