Home / 20,579.22-28,399.86-12,616.86

Finding the Fourth Proportional to 20,579.22, 28,399.86 and 12,616.86

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Solution

The fourth proportional to 20,579.22, 28,399.86 and 12,616.86 is: 17,411.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,579.22 : 28,399.86 = 12,616.86 : x
  2. Step 2: Convert to fraction form
    20,579.22/28,399.86 = 12,616.86/x
  3. Step 3: Cross multiply
    20,579.22x = 28,399.86 × 12,616.86
  4. Step 4: Simplify right side
    20,579.22x = 358,317,057.64
  5. Step 5: Solve for x
    x = 358,317,057.64/20,579.22
  6. Step 6: Final answer
    x = 17,411.60

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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.