Home / 39,042.72-53,878.59-21,137.67

Finding the Fourth Proportional to 39,042.72, 53,878.59 and 21,137.67

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Solution

The fourth proportional to 39,042.72, 53,878.59 and 21,137.67 is: 29,169.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,042.72 : 53,878.59 = 21,137.67 : x
  2. Step 2: Convert to fraction form
    39,042.72/53,878.59 = 21,137.67/x
  3. Step 3: Cross multiply
    39,042.72x = 53,878.59 × 21,137.67
  4. Step 4: Simplify right side
    39,042.72x = 1,138,867,855.49
  5. Step 5: Solve for x
    x = 1,138,867,855.49/39,042.72
  6. Step 6: Final answer
    x = 29,169.79

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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.