Home / 39,742.90-54,845.19-21,839.06

Finding the Fourth Proportional to 39,742.90, 54,845.19 and 21,839.06

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Solution

The fourth proportional to 39,742.90, 54,845.19 and 21,839.06 is: 30,137.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,742.90 : 54,845.19 = 21,839.06 : x
  2. Step 2: Convert to fraction form
    39,742.90/54,845.19 = 21,839.06/x
  3. Step 3: Cross multiply
    39,742.90x = 54,845.19 × 21,839.06
  4. Step 4: Simplify right side
    39,742.90x = 1,197,767,532.23
  5. Step 5: Solve for x
    x = 1,197,767,532.23/39,742.90
  6. Step 6: Final answer
    x = 30,137.90

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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.