Home / 20,447.89-28,217.91-11,495.29

Finding the Fourth Proportional to 20,447.89, 28,217.91 and 11,495.29

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Solution

The fourth proportional to 20,447.89, 28,217.91 and 11,495.29 is: 15,863.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,447.89 : 28,217.91 = 11,495.29 : x
  2. Step 2: Convert to fraction form
    20,447.89/28,217.91 = 11,495.29/x
  3. Step 3: Cross multiply
    20,447.89x = 28,217.91 × 11,495.29
  4. Step 4: Simplify right side
    20,447.89x = 324,373,058.64
  5. Step 5: Solve for x
    x = 324,373,058.64/20,447.89
  6. Step 6: Final answer
    x = 15,863.40

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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.