Home / 39,139.56-54,017.67-21,918.48

Finding the Fourth Proportional to 39,139.56, 54,017.67 and 21,918.48

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Solution

The fourth proportional to 39,139.56, 54,017.67 and 21,918.48 is: 30,250.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,139.56 : 54,017.67 = 21,918.48 : x
  2. Step 2: Convert to fraction form
    39,139.56/54,017.67 = 21,918.48/x
  3. Step 3: Cross multiply
    39,139.56x = 54,017.67 × 21,918.48
  4. Step 4: Simplify right side
    39,139.56x = 1,183,984,949.45
  5. Step 5: Solve for x
    x = 1,183,984,949.45/39,139.56
  6. Step 6: Final answer
    x = 30,250.34

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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.