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Finding the Fourth Proportional to 39,709.53, 54,799.15 and 21,804.54

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Solution

The fourth proportional to 39,709.53, 54,799.15 and 21,804.54 is: 30,090.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,709.53 : 54,799.15 = 21,804.54 : x
  2. Step 2: Convert to fraction form
    39,709.53/54,799.15 = 21,804.54/x
  3. Step 3: Cross multiply
    39,709.53x = 54,799.15 × 21,804.54
  4. Step 4: Simplify right side
    39,709.53x = 1,194,870,258.14
  5. Step 5: Solve for x
    x = 1,194,870,258.14/39,709.53
  6. Step 6: Final answer
    x = 30,090.26

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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.