Home / 13,413.60-20,120.40-9,914.40

Finding the Fourth Proportional to 13,413.60, 20,120.40 and 9,914.40

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Solution

The fourth proportional to 13,413.60, 20,120.40 and 9,914.40 is: 14,871.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,413.60 : 20,120.40 = 9,914.40 : x
  2. Step 2: Convert to fraction form
    13,413.60/20,120.40 = 9,914.40/x
  3. Step 3: Cross multiply
    13,413.60x = 20,120.40 × 9,914.40
  4. Step 4: Simplify right side
    13,413.60x = 199,481,693.76
  5. Step 5: Solve for x
    x = 199,481,693.76/13,413.60
  6. Step 6: Final answer
    x = 14,871.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.