Home / 21,299.58-29,393.91-11,868.72

Finding the Fourth Proportional to 21,299.58, 29,393.91 and 11,868.72

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Solution

The fourth proportional to 21,299.58, 29,393.91 and 11,868.72 is: 16,379.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,299.58 : 29,393.91 = 11,868.72 : x
  2. Step 2: Convert to fraction form
    21,299.58/29,393.91 = 11,868.72/x
  3. Step 3: Cross multiply
    21,299.58x = 29,393.91 × 11,868.72
  4. Step 4: Simplify right side
    21,299.58x = 348,868,087.50
  5. Step 5: Solve for x
    x = 348,868,087.50/21,299.58
  6. Step 6: Final answer
    x = 16,379.11

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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.