Home / 39,640.38-54,698.71-21,730.67

Finding the Fourth Proportional to 39,640.38, 54,698.71 and 21,730.67

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Solution

The fourth proportional to 39,640.38, 54,698.71 and 21,730.67 is: 29,985.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,640.38 : 54,698.71 = 21,730.67 : x
  2. Step 2: Convert to fraction form
    39,640.38/54,698.71 = 21,730.67/x
  3. Step 3: Cross multiply
    39,640.38x = 54,698.71 × 21,730.67
  4. Step 4: Simplify right side
    39,640.38x = 1,188,639,616.44
  5. Step 5: Solve for x
    x = 1,188,639,616.44/39,640.38
  6. Step 6: Final answer
    x = 29,985.58

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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.