Home / 39,485.89-54,491.78-21,580.51

Finding the Fourth Proportional to 39,485.89, 54,491.78 and 21,580.51

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Solution

The fourth proportional to 39,485.89, 54,491.78 and 21,580.51 is: 29,781.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,485.89 : 54,491.78 = 21,580.51 : x
  2. Step 2: Convert to fraction form
    39,485.89/54,491.78 = 21,580.51/x
  3. Step 3: Cross multiply
    39,485.89x = 54,491.78 × 21,580.51
  4. Step 4: Simplify right side
    39,485.89x = 1,175,960,292.98
  5. Step 5: Solve for x
    x = 1,175,960,292.98/39,485.89
  6. Step 6: Final answer
    x = 29,781.79

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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.