Home / 21,391.50-29,519.71-11,700.60

Finding the Fourth Proportional to 21,391.50, 29,519.71 and 11,700.60

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Solution

The fourth proportional to 21,391.50, 29,519.71 and 11,700.60 is: 16,146.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,391.50 : 29,519.71 = 11,700.60 : x
  2. Step 2: Convert to fraction form
    21,391.50/29,519.71 = 11,700.60/x
  3. Step 3: Cross multiply
    21,391.50x = 29,519.71 × 11,700.60
  4. Step 4: Simplify right side
    21,391.50x = 345,398,318.83
  5. Step 5: Solve for x
    x = 345,398,318.83/21,391.50
  6. Step 6: Final answer
    x = 16,146.52

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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.