Home / 15,413.60-21,297.12-13,720.16

Finding the Fourth Proportional to 15,413.60, 21,297.12 and 13,720.16

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Solution

The fourth proportional to 15,413.60, 21,297.12 and 13,720.16 is: 18,957.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,413.60 : 21,297.12 = 13,720.16 : x
  2. Step 2: Convert to fraction form
    15,413.60/21,297.12 = 13,720.16/x
  3. Step 3: Cross multiply
    15,413.60x = 21,297.12 × 13,720.16
  4. Step 4: Simplify right side
    15,413.60x = 292,199,893.94
  5. Step 5: Solve for x
    x = 292,199,893.94/15,413.60
  6. Step 6: Final answer
    x = 18,957.28

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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.