Home / 20,125.32-27,771.63-11,172.84

Finding the Fourth Proportional to 20,125.32, 27,771.63 and 11,172.84

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Solution

The fourth proportional to 20,125.32, 27,771.63 and 11,172.84 is: 15,417.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,125.32 : 27,771.63 = 11,172.84 : x
  2. Step 2: Convert to fraction form
    20,125.32/27,771.63 = 11,172.84/x
  3. Step 3: Cross multiply
    20,125.32x = 27,771.63 × 11,172.84
  4. Step 4: Simplify right side
    20,125.32x = 310,287,978.53
  5. Step 5: Solve for x
    x = 310,287,978.53/20,125.32
  6. Step 6: Final answer
    x = 15,417.79

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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.