Home / 12,790.46-19,185.76-5,390.20

Finding the Fourth Proportional to 12,790.46, 19,185.76 and 5,390.20

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Solution

The fourth proportional to 12,790.46, 19,185.76 and 5,390.20 is: 8,085.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,790.46 : 19,185.76 = 5,390.20 : x
  2. Step 2: Convert to fraction form
    12,790.46/19,185.76 = 5,390.20/x
  3. Step 3: Cross multiply
    12,790.46x = 19,185.76 × 5,390.20
  4. Step 4: Simplify right side
    12,790.46x = 103,415,006.35
  5. Step 5: Solve for x
    x = 103,415,006.35/12,790.46
  6. Step 6: Final answer
    x = 8,085.33

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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.