Home / 20,608.49-28,439.18-11,409.72

Finding the Fourth Proportional to 20,608.49, 28,439.18 and 11,409.72

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Solution

The fourth proportional to 20,608.49, 28,439.18 and 11,409.72 is: 15,745.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,608.49 : 28,439.18 = 11,409.72 : x
  2. Step 2: Convert to fraction form
    20,608.49/28,439.18 = 11,409.72/x
  3. Step 3: Cross multiply
    20,608.49x = 28,439.18 × 11,409.72
  4. Step 4: Simplify right side
    20,608.49x = 324,483,080.83
  5. Step 5: Solve for x
    x = 324,483,080.83/20,608.49
  6. Step 6: Final answer
    x = 15,745.12

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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.