Home / 39,768.63-54,878.60-21,860.19

Finding the Fourth Proportional to 39,768.63, 54,878.60 and 21,860.19

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Solution

The fourth proportional to 39,768.63, 54,878.60 and 21,860.19 is: 30,165.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,768.63 : 54,878.60 = 21,860.19 : x
  2. Step 2: Convert to fraction form
    39,768.63/54,878.60 = 21,860.19/x
  3. Step 3: Cross multiply
    39,768.63x = 54,878.60 × 21,860.19
  4. Step 4: Simplify right side
    39,768.63x = 1,199,656,622.93
  5. Step 5: Solve for x
    x = 1,199,656,622.93/39,768.63
  6. Step 6: Final answer
    x = 30,165.90

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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.