Home / 20,105.15-27,779.63-19,395.59

Finding the Fourth Proportional to 20,105.15, 27,779.63 and 19,395.59

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Solution

The fourth proportional to 20,105.15, 27,779.63 and 19,395.59 is: 26,799.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,105.15 : 27,779.63 = 19,395.59 : x
  2. Step 2: Convert to fraction form
    20,105.15/27,779.63 = 19,395.59/x
  3. Step 3: Cross multiply
    20,105.15x = 27,779.63 × 19,395.59
  4. Step 4: Simplify right side
    20,105.15x = 538,802,077.96
  5. Step 5: Solve for x
    x = 538,802,077.96/20,105.15
  6. Step 6: Final answer
    x = 26,799.21

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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.