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Finding the Fourth Proportional to 13,159.17, 18,157.91 and 8,449.83

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Solution

The fourth proportional to 13,159.17, 18,157.91 and 8,449.83 is: 11,659.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,159.17 : 18,157.91 = 8,449.83 : x
  2. Step 2: Convert to fraction form
    13,159.17/18,157.91 = 8,449.83/x
  3. Step 3: Cross multiply
    13,159.17x = 18,157.91 × 8,449.83
  4. Step 4: Simplify right side
    13,159.17x = 153,431,210.41
  5. Step 5: Solve for x
    x = 153,431,210.41/13,159.17
  6. Step 6: Final answer
    x = 11,659.64

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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.