Home / 20,485.95-28,268.79-11,410.62

Finding the Fourth Proportional to 20,485.95, 28,268.79 and 11,410.62

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Solution

The fourth proportional to 20,485.95, 28,268.79 and 11,410.62 is: 15,745.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.95 : 28,268.79 = 11,410.62 : x
  2. Step 2: Convert to fraction form
    20,485.95/28,268.79 = 11,410.62/x
  3. Step 3: Cross multiply
    20,485.95x = 28,268.79 × 11,410.62
  4. Step 4: Simplify right side
    20,485.95x = 322,564,420.55
  5. Step 5: Solve for x
    x = 322,564,420.55/20,485.95
  6. Step 6: Final answer
    x = 15,745.64

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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.