Home / 21,202.75-31,804.13-11,968.75

Finding the Fourth Proportional to 21,202.75, 31,804.13 and 11,968.75

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Solution

The fourth proportional to 21,202.75, 31,804.13 and 11,968.75 is: 17,953.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,202.75 : 31,804.13 = 11,968.75 : x
  2. Step 2: Convert to fraction form
    21,202.75/31,804.13 = 11,968.75/x
  3. Step 3: Cross multiply
    21,202.75x = 31,804.13 × 11,968.75
  4. Step 4: Simplify right side
    21,202.75x = 380,655,680.94
  5. Step 5: Solve for x
    x = 380,655,680.94/21,202.75
  6. Step 6: Final answer
    x = 17,953.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.