Home / 21,728.53-29,984.61-12,296.89

Finding the Fourth Proportional to 21,728.53, 29,984.61 and 12,296.89

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Solution

The fourth proportional to 21,728.53, 29,984.61 and 12,296.89 is: 16,969.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,728.53 : 29,984.61 = 12,296.89 : x
  2. Step 2: Convert to fraction form
    21,728.53/29,984.61 = 12,296.89/x
  3. Step 3: Cross multiply
    21,728.53x = 29,984.61 × 12,296.89
  4. Step 4: Simplify right side
    21,728.53x = 368,717,450.86
  5. Step 5: Solve for x
    x = 368,717,450.86/21,728.53
  6. Step 6: Final answer
    x = 16,969.28

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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.