Home / 21,021.28-31,535.64-6,982.16

Finding the Fourth Proportional to 21,021.28, 31,535.64 and 6,982.16

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Solution

The fourth proportional to 21,021.28, 31,535.64 and 6,982.16 is: 10,474.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.28 : 31,535.64 = 6,982.16 : x
  2. Step 2: Convert to fraction form
    21,021.28/31,535.64 = 6,982.16/x
  3. Step 3: Cross multiply
    21,021.28x = 31,535.64 × 6,982.16
  4. Step 4: Simplify right side
    21,021.28x = 220,186,884.18
  5. Step 5: Solve for x
    x = 220,186,884.18/21,021.28
  6. Step 6: Final answer
    x = 10,474.48

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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.