Home / 12,318.40-18,458.70-9,183.70

Finding the Fourth Proportional to 12,318.40, 18,458.70 and 9,183.70

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Solution

The fourth proportional to 12,318.40, 18,458.70 and 9,183.70 is: 13,761.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,318.40 : 18,458.70 = 9,183.70 : x
  2. Step 2: Convert to fraction form
    12,318.40/18,458.70 = 9,183.70/x
  3. Step 3: Cross multiply
    12,318.40x = 18,458.70 × 9,183.70
  4. Step 4: Simplify right side
    12,318.40x = 169,519,163.19
  5. Step 5: Solve for x
    x = 169,519,163.19/12,318.40
  6. Step 6: Final answer
    x = 13,761.46

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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.