Home / 13,318.80-18,376.74-8,536.56

Finding the Fourth Proportional to 13,318.80, 18,376.74 and 8,536.56

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Solution

The fourth proportional to 13,318.80, 18,376.74 and 8,536.56 is: 11,778.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,318.80 : 18,376.74 = 8,536.56 : x
  2. Step 2: Convert to fraction form
    13,318.80/18,376.74 = 8,536.56/x
  3. Step 3: Cross multiply
    13,318.80x = 18,376.74 × 8,536.56
  4. Step 4: Simplify right side
    13,318.80x = 156,874,143.61
  5. Step 5: Solve for x
    x = 156,874,143.61/13,318.80
  6. Step 6: Final answer
    x = 11,778.40

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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.