Home / 21,457.12-32,198.64-13,668.64

Finding the Fourth Proportional to 21,457.12, 32,198.64 and 13,668.64

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Solution

The fourth proportional to 21,457.12, 32,198.64 and 13,668.64 is: 20,511.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,457.12 : 32,198.64 = 13,668.64 : x
  2. Step 2: Convert to fraction form
    21,457.12/32,198.64 = 13,668.64/x
  3. Step 3: Cross multiply
    21,457.12x = 32,198.64 × 13,668.64
  4. Step 4: Simplify right side
    21,457.12x = 440,111,618.65
  5. Step 5: Solve for x
    x = 440,111,618.65/21,457.12
  6. Step 6: Final answer
    x = 20,511.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.