Home / 13,288.84-18,205.80-12,790.60

Finding the Fourth Proportional to 13,288.84, 18,205.80 and 12,790.60

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Solution

The fourth proportional to 13,288.84, 18,205.80 and 12,790.60 is: 17,523.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,288.84 : 18,205.80 = 12,790.60 : x
  2. Step 2: Convert to fraction form
    13,288.84/18,205.80 = 12,790.60/x
  3. Step 3: Cross multiply
    13,288.84x = 18,205.80 × 12,790.60
  4. Step 4: Simplify right side
    13,288.84x = 232,863,105.48
  5. Step 5: Solve for x
    x = 232,863,105.48/13,288.84
  6. Step 6: Final answer
    x = 17,523.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.