Home / 21,382.21-29,488.35-13,425.18

Finding the Fourth Proportional to 21,382.21, 29,488.35 and 13,425.18

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Solution

The fourth proportional to 21,382.21, 29,488.35 and 13,425.18 is: 18,514.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,382.21 : 29,488.35 = 13,425.18 : x
  2. Step 2: Convert to fraction form
    21,382.21/29,488.35 = 13,425.18/x
  3. Step 3: Cross multiply
    21,382.21x = 29,488.35 × 13,425.18
  4. Step 4: Simplify right side
    21,382.21x = 395,886,406.65
  5. Step 5: Solve for x
    x = 395,886,406.65/21,382.21
  6. Step 6: Final answer
    x = 18,514.76

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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.