Home / 21,211.58-29,266.71-11,777.78

Finding the Fourth Proportional to 21,211.58, 29,266.71 and 11,777.78

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Solution

The fourth proportional to 21,211.58, 29,266.71 and 11,777.78 is: 16,250.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,211.58 : 29,266.71 = 11,777.78 : x
  2. Step 2: Convert to fraction form
    21,211.58/29,266.71 = 11,777.78/x
  3. Step 3: Cross multiply
    21,211.58x = 29,266.71 × 11,777.78
  4. Step 4: Simplify right side
    21,211.58x = 344,696,871.70
  5. Step 5: Solve for x
    x = 344,696,871.70/21,211.58
  6. Step 6: Final answer
    x = 16,250.41

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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.