Home / 19,999.21-27,599.12-11,505.55

Finding the Fourth Proportional to 19,999.21, 27,599.12 and 11,505.55

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Solution

The fourth proportional to 19,999.21, 27,599.12 and 11,505.55 is: 15,877.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,999.21 : 27,599.12 = 11,505.55 : x
  2. Step 2: Convert to fraction form
    19,999.21/27,599.12 = 11,505.55/x
  3. Step 3: Cross multiply
    19,999.21x = 27,599.12 × 11,505.55
  4. Step 4: Simplify right side
    19,999.21x = 317,543,055.12
  5. Step 5: Solve for x
    x = 317,543,055.12/19,999.21
  6. Step 6: Final answer
    x = 15,877.78

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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.