Home / 12,121.64-16,728.09-7,086.29

Finding the Fourth Proportional to 12,121.64, 16,728.09 and 7,086.29

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Solution

The fourth proportional to 12,121.64, 16,728.09 and 7,086.29 is: 9,779.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.64 : 16,728.09 = 7,086.29 : x
  2. Step 2: Convert to fraction form
    12,121.64/16,728.09 = 7,086.29/x
  3. Step 3: Cross multiply
    12,121.64x = 16,728.09 × 7,086.29
  4. Step 4: Simplify right side
    12,121.64x = 118,540,096.89
  5. Step 5: Solve for x
    x = 118,540,096.89/12,121.64
  6. Step 6: Final answer
    x = 9,779.21

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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.