Home / 20,621.59-28,457.79-11,668.91

Finding the Fourth Proportional to 20,621.59, 28,457.79 and 11,668.91

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Solution

The fourth proportional to 20,621.59, 28,457.79 and 11,668.91 is: 16,103.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,621.59 : 28,457.79 = 11,668.91 : x
  2. Step 2: Convert to fraction form
    20,621.59/28,457.79 = 11,668.91/x
  3. Step 3: Cross multiply
    20,621.59x = 28,457.79 × 11,668.91
  4. Step 4: Simplify right side
    20,621.59x = 332,071,390.31
  5. Step 5: Solve for x
    x = 332,071,390.31/20,621.59
  6. Step 6: Final answer
    x = 16,103.09

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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.