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Finding the Fourth Proportional to 20,405.93, 30,608.85 and 7,258.82

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Solution

The fourth proportional to 20,405.93, 30,608.85 and 7,258.82 is: 10,888.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405.93 : 30,608.85 = 7,258.82 : x
  2. Step 2: Convert to fraction form
    20,405.93/30,608.85 = 7,258.82/x
  3. Step 3: Cross multiply
    20,405.93x = 30,608.85 × 7,258.82
  4. Step 4: Simplify right side
    20,405.93x = 222,184,132.56
  5. Step 5: Solve for x
    x = 222,184,132.56/20,405.93
  6. Step 6: Final answer
    x = 10,888.21

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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.