Home / 39,765.63-54,874.46-21,857.19

Finding the Fourth Proportional to 39,765.63, 54,874.46 and 21,857.19

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Solution

The fourth proportional to 39,765.63, 54,874.46 and 21,857.19 is: 30,161.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,765.63 : 54,874.46 = 21,857.19 : x
  2. Step 2: Convert to fraction form
    39,765.63/54,874.46 = 21,857.19/x
  3. Step 3: Cross multiply
    39,765.63x = 54,874.46 × 21,857.19
  4. Step 4: Simplify right side
    39,765.63x = 1,199,401,655.90
  5. Step 5: Solve for x
    x = 1,199,401,655.90/39,765.63
  6. Step 6: Final answer
    x = 30,161.76

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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.