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Finding the Fourth Proportional to 13,188.59, 18,200.24 and 7,220.24

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Solution

The fourth proportional to 13,188.59, 18,200.24 and 7,220.24 is: 9,963.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,188.59 : 18,200.24 = 7,220.24 : x
  2. Step 2: Convert to fraction form
    13,188.59/18,200.24 = 7,220.24/x
  3. Step 3: Cross multiply
    13,188.59x = 18,200.24 × 7,220.24
  4. Step 4: Simplify right side
    13,188.59x = 131,410,009.86
  5. Step 5: Solve for x
    x = 131,410,009.86/13,188.59
  6. Step 6: Final answer
    x = 9,963.92

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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.