Home / 20,238.06-30,268.35-12,318.72

Finding the Fourth Proportional to 20,238.06, 30,268.35 and 12,318.72

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Solution

The fourth proportional to 20,238.06, 30,268.35 and 12,318.72 is: 18,424.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,238.06 : 30,268.35 = 12,318.72 : x
  2. Step 2: Convert to fraction form
    20,238.06/30,268.35 = 12,318.72/x
  3. Step 3: Cross multiply
    20,238.06x = 30,268.35 × 12,318.72
  4. Step 4: Simplify right side
    20,238.06x = 372,867,328.51
  5. Step 5: Solve for x
    x = 372,867,328.51/20,238.06
  6. Step 6: Final answer
    x = 18,424.06

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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.