Home / 12,790.20-19,185.30-7,619.16

Finding the Fourth Proportional to 12,790.20, 19,185.30 and 7,619.16

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Solution

The fourth proportional to 12,790.20, 19,185.30 and 7,619.16 is: 11,428.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,790.20 : 19,185.30 = 7,619.16 : x
  2. Step 2: Convert to fraction form
    12,790.20/19,185.30 = 7,619.16/x
  3. Step 3: Cross multiply
    12,790.20x = 19,185.30 × 7,619.16
  4. Step 4: Simplify right side
    12,790.20x = 146,175,870.35
  5. Step 5: Solve for x
    x = 146,175,870.35/12,790.20
  6. Step 6: Final answer
    x = 11,428.74

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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.