Home / 12,318.45-18,499.95-11,380.39

Finding the Fourth Proportional to 12,318.45, 18,499.95 and 11,380.39

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Solution

The fourth proportional to 12,318.45, 18,499.95 and 11,380.39 is: 17,091.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,318.45 : 18,499.95 = 11,380.39 : x
  2. Step 2: Convert to fraction form
    12,318.45/18,499.95 = 11,380.39/x
  3. Step 3: Cross multiply
    12,318.45x = 18,499.95 × 11,380.39
  4. Step 4: Simplify right side
    12,318.45x = 210,536,599.73
  5. Step 5: Solve for x
    x = 210,536,599.73/12,318.45
  6. Step 6: Final answer
    x = 17,091.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.