Home / 39,686.72-54,768.56-21,782.87

Finding the Fourth Proportional to 39,686.72, 54,768.56 and 21,782.87

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Solution

The fourth proportional to 39,686.72, 54,768.56 and 21,782.87 is: 30,060.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,686.72 : 54,768.56 = 21,782.87 : x
  2. Step 2: Convert to fraction form
    39,686.72/54,768.56 = 21,782.87/x
  3. Step 3: Cross multiply
    39,686.72x = 54,768.56 × 21,782.87
  4. Step 4: Simplify right side
    39,686.72x = 1,193,016,039.81
  5. Step 5: Solve for x
    x = 1,193,016,039.81/39,686.72
  6. Step 6: Final answer
    x = 30,060.84

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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.