Home / 20,289.54-27,997.75-11,335.80

Finding the Fourth Proportional to 20,289.54, 27,997.75 and 11,335.80

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Solution

The fourth proportional to 20,289.54, 27,997.75 and 11,335.80 is: 15,642.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,289.54 : 27,997.75 = 11,335.80 : x
  2. Step 2: Convert to fraction form
    20,289.54/27,997.75 = 11,335.80/x
  3. Step 3: Cross multiply
    20,289.54x = 27,997.75 × 11,335.80
  4. Step 4: Simplify right side
    20,289.54x = 317,376,894.45
  5. Step 5: Solve for x
    x = 317,376,894.45/20,289.54
  6. Step 6: Final answer
    x = 15,642.39

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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.