Home / 13,640.31-20,460.46-11,785.81

Finding the Fourth Proportional to 13,640.31, 20,460.46 and 11,785.81

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Solution

The fourth proportional to 13,640.31, 20,460.46 and 11,785.81 is: 17,678.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,640.31 : 20,460.46 = 11,785.81 : x
  2. Step 2: Convert to fraction form
    13,640.31/20,460.46 = 11,785.81/x
  3. Step 3: Cross multiply
    13,640.31x = 20,460.46 × 11,785.81
  4. Step 4: Simplify right side
    13,640.31x = 241,143,094.07
  5. Step 5: Solve for x
    x = 241,143,094.07/13,640.31
  6. Step 6: Final answer
    x = 17,678.71

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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.