Home / 31,128.33-46,695.06-13,121.75

Finding the Fourth Proportional to 31,128.33, 46,695.06 and 13,121.75

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Solution

The fourth proportional to 31,128.33, 46,695.06 and 13,121.75 is: 19,683.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,128.33 : 46,695.06 = 13,121.75 : x
  2. Step 2: Convert to fraction form
    31,128.33/46,695.06 = 13,121.75/x
  3. Step 3: Cross multiply
    31,128.33x = 46,695.06 × 13,121.75
  4. Step 4: Simplify right side
    31,128.33x = 612,720,670.08
  5. Step 5: Solve for x
    x = 612,720,670.08/31,128.33
  6. Step 6: Final answer
    x = 19,683.70

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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.