Home / 20,421.36-28,181.61-11,468.97

Finding the Fourth Proportional to 20,421.36, 28,181.61 and 11,468.97

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Solution

The fourth proportional to 20,421.36, 28,181.61 and 11,468.97 is: 15,827.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421.36 : 28,181.61 = 11,468.97 : x
  2. Step 2: Convert to fraction form
    20,421.36/28,181.61 = 11,468.97/x
  3. Step 3: Cross multiply
    20,421.36x = 28,181.61 × 11,468.97
  4. Step 4: Simplify right side
    20,421.36x = 323,214,039.64
  5. Step 5: Solve for x
    x = 323,214,039.64/20,421.36
  6. Step 6: Final answer
    x = 15,827.25

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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.