Home / 20,113.89-27,756.45-11,161.77

Finding the Fourth Proportional to 20,113.89, 27,756.45 and 11,161.77

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Solution

The fourth proportional to 20,113.89, 27,756.45 and 11,161.77 is: 15,402.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,113.89 : 27,756.45 = 11,161.77 : x
  2. Step 2: Convert to fraction form
    20,113.89/27,756.45 = 11,161.77/x
  3. Step 3: Cross multiply
    20,113.89x = 27,756.45 × 11,161.77
  4. Step 4: Simplify right side
    20,113.89x = 309,811,110.92
  5. Step 5: Solve for x
    x = 309,811,110.92/20,113.89
  6. Step 6: Final answer
    x = 15,402.84

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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.