Home / 39,768.76-54,881-21,865.60

Finding the Fourth Proportional to 39,768.76, 54,881 and 21,865.60

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Solution

The fourth proportional to 39,768.76, 54,881 and 21,865.60 is: 30,174.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,768.76 : 54,881 = 21,865.60 : x
  2. Step 2: Convert to fraction form
    39,768.76/54,881 = 21,865.60/x
  3. Step 3: Cross multiply
    39,768.76x = 54,881 × 21,865.60
  4. Step 4: Simplify right side
    39,768.76x = 1,200,005,993.60
  5. Step 5: Solve for x
    x = 1,200,005,993.60/39,768.76
  6. Step 6: Final answer
    x = 30,174.59

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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.