Home / 21,150.80-29,202.36-18,905.48

Finding the Fourth Proportional to 21,150.80, 29,202.36 and 18,905.48

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Solution

The fourth proportional to 21,150.80, 29,202.36 and 18,905.48 is: 26,102.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,150.80 : 29,202.36 = 18,905.48 : x
  2. Step 2: Convert to fraction form
    21,150.80/29,202.36 = 18,905.48/x
  3. Step 3: Cross multiply
    21,150.80x = 29,202.36 × 18,905.48
  4. Step 4: Simplify right side
    21,150.80x = 552,084,632.93
  5. Step 5: Solve for x
    x = 552,084,632.93/21,150.80
  6. Step 6: Final answer
    x = 26,102.31

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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.