Home / 20,113.69-27,758.55-11,161.03

Finding the Fourth Proportional to 20,113.69, 27,758.55 and 11,161.03

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Solution

The fourth proportional to 20,113.69, 27,758.55 and 11,161.03 is: 15,403.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,113.69 : 27,758.55 = 11,161.03 : x
  2. Step 2: Convert to fraction form
    20,113.69/27,758.55 = 11,161.03/x
  3. Step 3: Cross multiply
    20,113.69x = 27,758.55 × 11,161.03
  4. Step 4: Simplify right side
    20,113.69x = 309,814,009.31
  5. Step 5: Solve for x
    x = 309,814,009.31/20,113.69
  6. Step 6: Final answer
    x = 15,403.14

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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.