Home / 39,815.30-54,946-21,910.28

Finding the Fourth Proportional to 39,815.30, 54,946 and 21,910.28

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Solution

The fourth proportional to 39,815.30, 54,946 and 21,910.28 is: 30,236.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,815.30 : 54,946 = 21,910.28 : x
  2. Step 2: Convert to fraction form
    39,815.30/54,946 = 21,910.28/x
  3. Step 3: Cross multiply
    39,815.30x = 54,946 × 21,910.28
  4. Step 4: Simplify right side
    39,815.30x = 1,203,882,244.88
  5. Step 5: Solve for x
    x = 1,203,882,244.88/39,815.30
  6. Step 6: Final answer
    x = 30,236.67

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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.