Home / 12,159.87-18,240.62-3,840.23

Finding the Fourth Proportional to 12,159.87, 18,240.62 and 3,840.23

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Solution

The fourth proportional to 12,159.87, 18,240.62 and 3,840.23 is: 5,760.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,159.87 : 18,240.62 = 3,840.23 : x
  2. Step 2: Convert to fraction form
    12,159.87/18,240.62 = 3,840.23/x
  3. Step 3: Cross multiply
    12,159.87x = 18,240.62 × 3,840.23
  4. Step 4: Simplify right side
    12,159.87x = 70,048,065.74
  5. Step 5: Solve for x
    x = 70,048,065.74/12,159.87
  6. Step 6: Final answer
    x = 5,760.59

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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.