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Finding the Fourth Proportional to 13,188.16, 18,199.92 and 7,883.20

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Solution

The fourth proportional to 13,188.16, 18,199.92 and 7,883.20 is: 10,878.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,188.16 : 18,199.92 = 7,883.20 : x
  2. Step 2: Convert to fraction form
    13,188.16/18,199.92 = 7,883.20/x
  3. Step 3: Cross multiply
    13,188.16x = 18,199.92 × 7,883.20
  4. Step 4: Simplify right side
    13,188.16x = 143,473,609.34
  5. Step 5: Solve for x
    x = 143,473,609.34/13,188.16
  6. Step 6: Final answer
    x = 10,878.97

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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.