Home / 13,766.78-18,999.75-12,922.31

Finding the Fourth Proportional to 13,766.78, 18,999.75 and 12,922.31

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Solution

The fourth proportional to 13,766.78, 18,999.75 and 12,922.31 is: 17,834.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,766.78 : 18,999.75 = 12,922.31 : x
  2. Step 2: Convert to fraction form
    13,766.78/18,999.75 = 12,922.31/x
  3. Step 3: Cross multiply
    13,766.78x = 18,999.75 × 12,922.31
  4. Step 4: Simplify right side
    13,766.78x = 245,520,659.42
  5. Step 5: Solve for x
    x = 245,520,659.42/13,766.78
  6. Step 6: Final answer
    x = 17,834.28

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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.