Home / 21,125.48-31,836.51-19,019.21

Finding the Fourth Proportional to 21,125.48, 31,836.51 and 19,019.21

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Solution

The fourth proportional to 21,125.48, 31,836.51 and 19,019.21 is: 28,662.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,125.48 : 31,836.51 = 19,019.21 : x
  2. Step 2: Convert to fraction form
    21,125.48/31,836.51 = 19,019.21/x
  3. Step 3: Cross multiply
    21,125.48x = 31,836.51 × 19,019.21
  4. Step 4: Simplify right side
    21,125.48x = 605,505,233.70
  5. Step 5: Solve for x
    x = 605,505,233.70/21,125.48
  6. Step 6: Final answer
    x = 28,662.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.