Home / 15,413.98-21,271.26-8,340.40

Finding the Fourth Proportional to 15,413.98, 21,271.26 and 8,340.40

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Solution

The fourth proportional to 15,413.98, 21,271.26 and 8,340.40 is: 11,509.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,413.98 : 21,271.26 = 8,340.40 : x
  2. Step 2: Convert to fraction form
    15,413.98/21,271.26 = 8,340.40/x
  3. Step 3: Cross multiply
    15,413.98x = 21,271.26 × 8,340.40
  4. Step 4: Simplify right side
    15,413.98x = 177,410,816.90
  5. Step 5: Solve for x
    x = 177,410,816.90/15,413.98
  6. Step 6: Final answer
    x = 11,509.73

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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.