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Finding the Fourth Proportional to 13,568.51, 18,723.08 and 7,518.58

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Solution

The fourth proportional to 13,568.51, 18,723.08 and 7,518.58 is: 10,374.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,568.51 : 18,723.08 = 7,518.58 : x
  2. Step 2: Convert to fraction form
    13,568.51/18,723.08 = 7,518.58/x
  3. Step 3: Cross multiply
    13,568.51x = 18,723.08 × 7,518.58
  4. Step 4: Simplify right side
    13,568.51x = 140,770,946.82
  5. Step 5: Solve for x
    x = 140,770,946.82/13,568.51
  6. Step 6: Final answer
    x = 10,374.83

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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.