Home / 39,688.86-54,771.30-21,785.54

Finding the Fourth Proportional to 39,688.86, 54,771.30 and 21,785.54

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Solution

The fourth proportional to 39,688.86, 54,771.30 and 21,785.54 is: 30,064.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,688.86 : 54,771.30 = 21,785.54 : x
  2. Step 2: Convert to fraction form
    39,688.86/54,771.30 = 21,785.54/x
  3. Step 3: Cross multiply
    39,688.86x = 54,771.30 × 21,785.54
  4. Step 4: Simplify right side
    39,688.86x = 1,193,222,347.00
  5. Step 5: Solve for x
    x = 1,193,222,347.00/39,688.86
  6. Step 6: Final answer
    x = 30,064.41

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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.