Home / 20,849.64-28,772.55-11,289.63

Finding the Fourth Proportional to 20,849.64, 28,772.55 and 11,289.63

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Solution

The fourth proportional to 20,849.64, 28,772.55 and 11,289.63 is: 15,579.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,849.64 : 28,772.55 = 11,289.63 : x
  2. Step 2: Convert to fraction form
    20,849.64/28,772.55 = 11,289.63/x
  3. Step 3: Cross multiply
    20,849.64x = 28,772.55 × 11,289.63
  4. Step 4: Simplify right side
    20,849.64x = 324,831,443.66
  5. Step 5: Solve for x
    x = 324,831,443.66/20,849.64
  6. Step 6: Final answer
    x = 15,579.71

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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.