Home / 12,790.90-17,643.97-8,811.77

Finding the Fourth Proportional to 12,790.90, 17,643.97 and 8,811.77

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Solution

The fourth proportional to 12,790.90, 17,643.97 and 8,811.77 is: 12,155.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,790.90 : 17,643.97 = 8,811.77 : x
  2. Step 2: Convert to fraction form
    12,790.90/17,643.97 = 8,811.77/x
  3. Step 3: Cross multiply
    12,790.90x = 17,643.97 × 8,811.77
  4. Step 4: Simplify right side
    12,790.90x = 155,474,605.53
  5. Step 5: Solve for x
    x = 155,474,605.53/12,790.90
  6. Step 6: Final answer
    x = 12,155.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.