Home / 21,352.78-29,466.89-11,921.95

Finding the Fourth Proportional to 21,352.78, 29,466.89 and 11,921.95

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Solution

The fourth proportional to 21,352.78, 29,466.89 and 11,921.95 is: 16,452.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,352.78 : 29,466.89 = 11,921.95 : x
  2. Step 2: Convert to fraction form
    21,352.78/29,466.89 = 11,921.95/x
  3. Step 3: Cross multiply
    21,352.78x = 29,466.89 × 11,921.95
  4. Step 4: Simplify right side
    21,352.78x = 351,302,789.24
  5. Step 5: Solve for x
    x = 351,302,789.24/21,352.78
  6. Step 6: Final answer
    x = 16,452.32

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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.