Home / 15,128.76-20,876.48-8,413.86

Finding the Fourth Proportional to 15,128.76, 20,876.48 and 8,413.86

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Solution

The fourth proportional to 15,128.76, 20,876.48 and 8,413.86 is: 11,610.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128.76 : 20,876.48 = 8,413.86 : x
  2. Step 2: Convert to fraction form
    15,128.76/20,876.48 = 8,413.86/x
  3. Step 3: Cross multiply
    15,128.76x = 20,876.48 × 8,413.86
  4. Step 4: Simplify right side
    15,128.76x = 175,651,780.01
  5. Step 5: Solve for x
    x = 175,651,780.01/15,128.76
  6. Step 6: Final answer
    x = 11,610.45

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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.