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Finding the Fourth Proportional to 13,659.73, 18,840.98 and 8,357.18

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Solution

The fourth proportional to 13,659.73, 18,840.98 and 8,357.18 is: 11,527.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,659.73 : 18,840.98 = 8,357.18 : x
  2. Step 2: Convert to fraction form
    13,659.73/18,840.98 = 8,357.18/x
  3. Step 3: Cross multiply
    13,659.73x = 18,840.98 × 8,357.18
  4. Step 4: Simplify right side
    13,659.73x = 157,457,387.92
  5. Step 5: Solve for x
    x = 157,457,387.92/13,659.73
  6. Step 6: Final answer
    x = 11,527.13

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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.