Home / 20,621.09-28,457.10-11,668.41

Finding the Fourth Proportional to 20,621.09, 28,457.10 and 11,668.41

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Solution

The fourth proportional to 20,621.09, 28,457.10 and 11,668.41 is: 16,102.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,621.09 : 28,457.10 = 11,668.41 : x
  2. Step 2: Convert to fraction form
    20,621.09/28,457.10 = 11,668.41/x
  3. Step 3: Cross multiply
    20,621.09x = 28,457.10 × 11,668.41
  4. Step 4: Simplify right side
    20,621.09x = 332,049,110.21
  5. Step 5: Solve for x
    x = 332,049,110.21/20,621.09
  6. Step 6: Final answer
    x = 16,102.40

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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.