Home / 31,187.78-43,039.04-17,040.72

Finding the Fourth Proportional to 31,187.78, 43,039.04 and 17,040.72

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Solution

The fourth proportional to 31,187.78, 43,039.04 and 17,040.72 is: 23,516.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,187.78 : 43,039.04 = 17,040.72 : x
  2. Step 2: Convert to fraction form
    31,187.78/43,039.04 = 17,040.72/x
  3. Step 3: Cross multiply
    31,187.78x = 43,039.04 × 17,040.72
  4. Step 4: Simplify right side
    31,187.78x = 733,416,144.51
  5. Step 5: Solve for x
    x = 733,416,144.51/31,187.78
  6. Step 6: Final answer
    x = 23,516.14

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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.