Home / 12,790.80-19,190.15-6,555.21

Finding the Fourth Proportional to 12,790.80, 19,190.15 and 6,555.21

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Solution

The fourth proportional to 12,790.80, 19,190.15 and 6,555.21 is: 9,834.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,790.80 : 19,190.15 = 6,555.21 : x
  2. Step 2: Convert to fraction form
    12,790.80/19,190.15 = 6,555.21/x
  3. Step 3: Cross multiply
    12,790.80x = 19,190.15 × 6,555.21
  4. Step 4: Simplify right side
    12,790.80x = 125,795,430.41
  5. Step 5: Solve for x
    x = 125,795,430.41/12,790.80
  6. Step 6: Final answer
    x = 9,834.84

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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.