Home / 39,636.87-54,698.39-21,731.89

Finding the Fourth Proportional to 39,636.87, 54,698.39 and 21,731.89

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Solution

The fourth proportional to 39,636.87, 54,698.39 and 21,731.89 is: 29,989.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,636.87 : 54,698.39 = 21,731.89 : x
  2. Step 2: Convert to fraction form
    39,636.87/54,698.39 = 21,731.89/x
  3. Step 3: Cross multiply
    39,636.87x = 54,698.39 × 21,731.89
  4. Step 4: Simplify right side
    39,636.87x = 1,188,699,012.51
  5. Step 5: Solve for x
    x = 1,188,699,012.51/39,636.87
  6. Step 6: Final answer
    x = 29,989.73

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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.