Home / 39,285.19-54,212.52-21,379.81

Finding the Fourth Proportional to 39,285.19, 54,212.52 and 21,379.81

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Solution

The fourth proportional to 39,285.19, 54,212.52 and 21,379.81 is: 29,503.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,285.19 : 54,212.52 = 21,379.81 : x
  2. Step 2: Convert to fraction form
    39,285.19/54,212.52 = 21,379.81/x
  3. Step 3: Cross multiply
    39,285.19x = 54,212.52 × 21,379.81
  4. Step 4: Simplify right side
    39,285.19x = 1,159,053,566.20
  5. Step 5: Solve for x
    x = 1,159,053,566.20/39,285.19
  6. Step 6: Final answer
    x = 29,503.57

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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.