Home / 15,128.03-20,876.31-8,413.40

Finding the Fourth Proportional to 15,128.03, 20,876.31 and 8,413.40

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Solution

The fourth proportional to 15,128.03, 20,876.31 and 8,413.40 is: 11,610.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128.03 : 20,876.31 = 8,413.40 : x
  2. Step 2: Convert to fraction form
    15,128.03/20,876.31 = 8,413.40/x
  3. Step 3: Cross multiply
    15,128.03x = 20,876.31 × 8,413.40
  4. Step 4: Simplify right side
    15,128.03x = 175,640,642.17
  5. Step 5: Solve for x
    x = 175,640,642.17/15,128.03
  6. Step 6: Final answer
    x = 11,610.28

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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.