Home / 20,495.72-28,284.42-11,421.09

Finding the Fourth Proportional to 20,495.72, 28,284.42 and 11,421.09

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Solution

The fourth proportional to 20,495.72, 28,284.42 and 11,421.09 is: 15,761.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,495.72 : 28,284.42 = 11,421.09 : x
  2. Step 2: Convert to fraction form
    20,495.72/28,284.42 = 11,421.09/x
  3. Step 3: Cross multiply
    20,495.72x = 28,284.42 × 11,421.09
  4. Step 4: Simplify right side
    20,495.72x = 323,038,906.42
  5. Step 5: Solve for x
    x = 323,038,906.42/20,495.72
  6. Step 6: Final answer
    x = 15,761.29

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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.