Home / 28,409.78-39,191.08-21,683.73

Finding the Fourth Proportional to 28,409.78, 39,191.08 and 21,683.73

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Solution

The fourth proportional to 28,409.78, 39,191.08 and 21,683.73 is: 29,912.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,409.78 : 39,191.08 = 21,683.73 : x
  2. Step 2: Convert to fraction form
    28,409.78/39,191.08 = 21,683.73/x
  3. Step 3: Cross multiply
    28,409.78x = 39,191.08 × 21,683.73
  4. Step 4: Simplify right side
    28,409.78x = 849,808,797.13
  5. Step 5: Solve for x
    x = 849,808,797.13/28,409.78
  6. Step 6: Final answer
    x = 29,912.54

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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.