Home / 21,309.70-29,405.28-11,877.25

Finding the Fourth Proportional to 21,309.70, 29,405.28 and 11,877.25

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Solution

The fourth proportional to 21,309.70, 29,405.28 and 11,877.25 is: 16,389.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,309.70 : 29,405.28 = 11,877.25 : x
  2. Step 2: Convert to fraction form
    21,309.70/29,405.28 = 11,877.25/x
  3. Step 3: Cross multiply
    21,309.70x = 29,405.28 × 11,877.25
  4. Step 4: Simplify right side
    21,309.70x = 349,253,861.88
  5. Step 5: Solve for x
    x = 349,253,861.88/21,309.70
  6. Step 6: Final answer
    x = 16,389.43

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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.