Home / 15,128.32-20,874.56-8,413.76

Finding the Fourth Proportional to 15,128.32, 20,874.56 and 8,413.76

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Solution

The fourth proportional to 15,128.32, 20,874.56 and 8,413.76 is: 11,609.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128.32 : 20,874.56 = 8,413.76 : x
  2. Step 2: Convert to fraction form
    15,128.32/20,874.56 = 8,413.76/x
  3. Step 3: Cross multiply
    15,128.32x = 20,874.56 × 8,413.76
  4. Step 4: Simplify right side
    15,128.32x = 175,633,537.95
  5. Step 5: Solve for x
    x = 175,633,537.95/15,128.32
  6. Step 6: Final answer
    x = 11,609.59

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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.