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Finding the Fourth Proportional to 13,170.76, 18,176.04 and 7,202.32

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Solution

The fourth proportional to 13,170.76, 18,176.04 and 7,202.32 is: 9,939.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,170.76 : 18,176.04 = 7,202.32 : x
  2. Step 2: Convert to fraction form
    13,170.76/18,176.04 = 7,202.32/x
  3. Step 3: Cross multiply
    13,170.76x = 18,176.04 × 7,202.32
  4. Step 4: Simplify right side
    13,170.76x = 130,909,656.41
  5. Step 5: Solve for x
    x = 130,909,656.41/13,170.76
  6. Step 6: Final answer
    x = 9,939.42

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Double scale
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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.