Home / 12,786.12-19,187.43-5,390.62

Finding the Fourth Proportional to 12,786.12, 19,187.43 and 5,390.62

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Solution

The fourth proportional to 12,786.12, 19,187.43 and 5,390.62 is: 8,089.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,786.12 : 19,187.43 = 5,390.62 : x
  2. Step 2: Convert to fraction form
    12,786.12/19,187.43 = 5,390.62/x
  3. Step 3: Cross multiply
    12,786.12x = 19,187.43 × 5,390.62
  4. Step 4: Simplify right side
    12,786.12x = 103,432,075.72
  5. Step 5: Solve for x
    x = 103,432,075.72/12,786.12
  6. Step 6: Final answer
    x = 8,089.40

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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.