Home / 15,128.02-20,874.21-8,413.48

Finding the Fourth Proportional to 15,128.02, 20,874.21 and 8,413.48

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Solution

The fourth proportional to 15,128.02, 20,874.21 and 8,413.48 is: 11,609.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128.02 : 20,874.21 = 8,413.48 : x
  2. Step 2: Convert to fraction form
    15,128.02/20,874.21 = 8,413.48/x
  3. Step 3: Cross multiply
    15,128.02x = 20,874.21 × 8,413.48
  4. Step 4: Simplify right side
    15,128.02x = 175,624,643.98
  5. Step 5: Solve for x
    x = 175,624,643.98/15,128.02
  6. Step 6: Final answer
    x = 11,609.23

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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.