Home / 18,697.12-25,790.64-11,138.48

Finding the Fourth Proportional to 18,697.12, 25,790.64 and 11,138.48

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Solution

The fourth proportional to 18,697.12, 25,790.64 and 11,138.48 is: 15,364.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,697.12 : 25,790.64 = 11,138.48 : x
  2. Step 2: Convert to fraction form
    18,697.12/25,790.64 = 11,138.48/x
  3. Step 3: Cross multiply
    18,697.12x = 25,790.64 × 11,138.48
  4. Step 4: Simplify right side
    18,697.12x = 287,268,527.83
  5. Step 5: Solve for x
    x = 287,268,527.83/18,697.12
  6. Step 6: Final answer
    x = 15,364.32

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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.