Home / 21,490.11-29,619.68-15,118.65

Finding the Fourth Proportional to 21,490.11, 29,619.68 and 15,118.65

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Solution

The fourth proportional to 21,490.11, 29,619.68 and 15,118.65 is: 20,837.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,490.11 : 29,619.68 = 15,118.65 : x
  2. Step 2: Convert to fraction form
    21,490.11/29,619.68 = 15,118.65/x
  3. Step 3: Cross multiply
    21,490.11x = 29,619.68 × 15,118.65
  4. Step 4: Simplify right side
    21,490.11x = 447,809,499.44
  5. Step 5: Solve for x
    x = 447,809,499.44/21,490.11
  6. Step 6: Final answer
    x = 20,837.93

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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.