Home / 12,191.65-18,285.60-3,870.58

Finding the Fourth Proportional to 12,191.65, 18,285.60 and 3,870.58

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Solution

The fourth proportional to 12,191.65, 18,285.60 and 3,870.58 is: 5,805.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,191.65 : 18,285.60 = 3,870.58 : x
  2. Step 2: Convert to fraction form
    12,191.65/18,285.60 = 3,870.58/x
  3. Step 3: Cross multiply
    12,191.65x = 18,285.60 × 3,870.58
  4. Step 4: Simplify right side
    12,191.65x = 70,775,786.22
  5. Step 5: Solve for x
    x = 70,775,786.22/12,191.65
  6. Step 6: Final answer
    x = 5,805.27

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1.5x scale

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.