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Finding the Fourth Proportional to 21,338.65, 29,446.72 and 11,907.01

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Solution

The fourth proportional to 21,338.65, 29,446.72 and 11,907.01 is: 16,431.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,338.65 : 29,446.72 = 11,907.01 : x
  2. Step 2: Convert to fraction form
    21,338.65/29,446.72 = 11,907.01/x
  3. Step 3: Cross multiply
    21,338.65x = 29,446.72 × 11,907.01
  4. Step 4: Simplify right side
    21,338.65x = 350,622,389.51
  5. Step 5: Solve for x
    x = 350,622,389.51/21,338.65
  6. Step 6: Final answer
    x = 16,431.33

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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.