Home / 18,964.58-28,440.72-7,865.30

Finding the Fourth Proportional to 18,964.58, 28,440.72 and 7,865.30

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Solution

The fourth proportional to 18,964.58, 28,440.72 and 7,865.30 is: 11,795.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,964.58 : 28,440.72 = 7,865.30 : x
  2. Step 2: Convert to fraction form
    18,964.58/28,440.72 = 7,865.30/x
  3. Step 3: Cross multiply
    18,964.58x = 28,440.72 × 7,865.30
  4. Step 4: Simplify right side
    18,964.58x = 223,694,795.02
  5. Step 5: Solve for x
    x = 223,694,795.02/18,964.58
  6. Step 6: Final answer
    x = 11,795.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.