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Finding the Fourth Proportional to 11,568.96, 15,954.48 and 8,686.20

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Solution

The fourth proportional to 11,568.96, 15,954.48 and 8,686.20 is: 11,978.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,568.96 : 15,954.48 = 8,686.20 : x
  2. Step 2: Convert to fraction form
    11,568.96/15,954.48 = 8,686.20/x
  3. Step 3: Cross multiply
    11,568.96x = 15,954.48 × 8,686.20
  4. Step 4: Simplify right side
    11,568.96x = 138,583,804.18
  5. Step 5: Solve for x
    x = 138,583,804.18/11,568.96
  6. Step 6: Final answer
    x = 11,978.93

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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.