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Finding the Fourth Proportional to 21,488.29, 29,653.72 and 11,928.29

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Solution

The fourth proportional to 21,488.29, 29,653.72 and 11,928.29 is: 16,460.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,488.29 : 29,653.72 = 11,928.29 : x
  2. Step 2: Convert to fraction form
    21,488.29/29,653.72 = 11,928.29/x
  3. Step 3: Cross multiply
    21,488.29x = 29,653.72 × 11,928.29
  4. Step 4: Simplify right side
    21,488.29x = 353,717,993.65
  5. Step 5: Solve for x
    x = 353,717,993.65/21,488.29
  6. Step 6: Final answer
    x = 16,460.97

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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.