Home / 15,388.16-21,230.94-9,413.60

Finding the Fourth Proportional to 15,388.16, 21,230.94 and 9,413.60

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Solution

The fourth proportional to 15,388.16, 21,230.94 and 9,413.60 is: 12,987.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,388.16 : 21,230.94 = 9,413.60 : x
  2. Step 2: Convert to fraction form
    15,388.16/21,230.94 = 9,413.60/x
  3. Step 3: Cross multiply
    15,388.16x = 21,230.94 × 9,413.60
  4. Step 4: Simplify right side
    15,388.16x = 199,859,576.78
  5. Step 5: Solve for x
    x = 199,859,576.78/15,388.16
  6. Step 6: Final answer
    x = 12,987.88

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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.