Home / 12,782.03-19,143.28-12,338.65

Finding the Fourth Proportional to 12,782.03, 19,143.28 and 12,338.65

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Solution

The fourth proportional to 12,782.03, 19,143.28 and 12,338.65 is: 18,479.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,782.03 : 19,143.28 = 12,338.65 : x
  2. Step 2: Convert to fraction form
    12,782.03/19,143.28 = 12,338.65/x
  3. Step 3: Cross multiply
    12,782.03x = 19,143.28 × 12,338.65
  4. Step 4: Simplify right side
    12,782.03x = 236,202,234.19
  5. Step 5: Solve for x
    x = 236,202,234.19/12,782.03
  6. Step 6: Final answer
    x = 18,479.25

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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.