Home / 20,118.05-27,762.90-11,165.55

Finding the Fourth Proportional to 20,118.05, 27,762.90 and 11,165.55

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Solution

The fourth proportional to 20,118.05, 27,762.90 and 11,165.55 is: 15,408.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,118.05 : 27,762.90 = 11,165.55 : x
  2. Step 2: Convert to fraction form
    20,118.05/27,762.90 = 11,165.55/x
  3. Step 3: Cross multiply
    20,118.05x = 27,762.90 × 11,165.55
  4. Step 4: Simplify right side
    20,118.05x = 309,987,964.92
  5. Step 5: Solve for x
    x = 309,987,964.92/20,118.05
  6. Step 6: Final answer
    x = 15,408.45

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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.