Home / 20,579.75-28,399.97-11,148.32

Finding the Fourth Proportional to 20,579.75, 28,399.97 and 11,148.32

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Solution

The fourth proportional to 20,579.75, 28,399.97 and 11,148.32 is: 15,384.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,579.75 : 28,399.97 = 11,148.32 : x
  2. Step 2: Convert to fraction form
    20,579.75/28,399.97 = 11,148.32/x
  3. Step 3: Cross multiply
    20,579.75x = 28,399.97 × 11,148.32
  4. Step 4: Simplify right side
    20,579.75x = 316,611,829.96
  5. Step 5: Solve for x
    x = 316,611,829.96/20,579.75
  6. Step 6: Final answer
    x = 15,384.63

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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.