Home / 31,618.78-43,629.50-30,768.28

Finding the Fourth Proportional to 31,618.78, 43,629.50 and 30,768.28

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Solution

The fourth proportional to 31,618.78, 43,629.50 and 30,768.28 is: 42,455.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,618.78 : 43,629.50 = 30,768.28 : x
  2. Step 2: Convert to fraction form
    31,618.78/43,629.50 = 30,768.28/x
  3. Step 3: Cross multiply
    31,618.78x = 43,629.50 × 30,768.28
  4. Step 4: Simplify right side
    31,618.78x = 1,342,404,640.11
  5. Step 5: Solve for x
    x = 1,342,404,640.11/31,618.78
  6. Step 6: Final answer
    x = 42,455.93

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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.