Home / 39,777.56-54,891.60-21,872.40

Finding the Fourth Proportional to 39,777.56, 54,891.60 and 21,872.40

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Solution

The fourth proportional to 39,777.56, 54,891.60 and 21,872.40 is: 30,183.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,777.56 : 54,891.60 = 21,872.40 : x
  2. Step 2: Convert to fraction form
    39,777.56/54,891.60 = 21,872.40/x
  3. Step 3: Cross multiply
    39,777.56x = 54,891.60 × 21,872.40
  4. Step 4: Simplify right side
    39,777.56x = 1,200,611,031.84
  5. Step 5: Solve for x
    x = 1,200,611,031.84/39,777.56
  6. Step 6: Final answer
    x = 30,183.12

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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.