Home / 21,103.74-29,123.28-11,672.64

Finding the Fourth Proportional to 21,103.74, 29,123.28 and 11,672.64

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Solution

The fourth proportional to 21,103.74, 29,123.28 and 11,672.64 is: 16,108.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,103.74 : 29,123.28 = 11,672.64 : x
  2. Step 2: Convert to fraction form
    21,103.74/29,123.28 = 11,672.64/x
  3. Step 3: Cross multiply
    21,103.74x = 29,123.28 × 11,672.64
  4. Step 4: Simplify right side
    21,103.74x = 339,945,563.06
  5. Step 5: Solve for x
    x = 339,945,563.06/21,103.74
  6. Step 6: Final answer
    x = 16,108.31

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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.