Home / 21,021.84-31,525.04-6,979.28

Finding the Fourth Proportional to 21,021.84, 31,525.04 and 6,979.28

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Solution

The fourth proportional to 21,021.84, 31,525.04 and 6,979.28 is: 10,466.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.84 : 31,525.04 = 6,979.28 : x
  2. Step 2: Convert to fraction form
    21,021.84/31,525.04 = 6,979.28/x
  3. Step 3: Cross multiply
    21,021.84x = 31,525.04 × 6,979.28
  4. Step 4: Simplify right side
    21,021.84x = 220,022,081.17
  5. Step 5: Solve for x
    x = 220,022,081.17/21,021.84
  6. Step 6: Final answer
    x = 10,466.36

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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.