Home / 21,271.09-29,353.60-11,839.45

Finding the Fourth Proportional to 21,271.09, 29,353.60 and 11,839.45

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Solution

The fourth proportional to 21,271.09, 29,353.60 and 11,839.45 is: 16,338.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.09 : 29,353.60 = 11,839.45 : x
  2. Step 2: Convert to fraction form
    21,271.09/29,353.60 = 11,839.45/x
  3. Step 3: Cross multiply
    21,271.09x = 29,353.60 × 11,839.45
  4. Step 4: Simplify right side
    21,271.09x = 347,530,479.52
  5. Step 5: Solve for x
    x = 347,530,479.52/21,271.09
  6. Step 6: Final answer
    x = 16,338.16

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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.