Home / 21,179.08-31,771.50-7,329.16

Finding the Fourth Proportional to 21,179.08, 31,771.50 and 7,329.16

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Solution

The fourth proportional to 21,179.08, 31,771.50 and 7,329.16 is: 10,994.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.08 : 31,771.50 = 7,329.16 : x
  2. Step 2: Convert to fraction form
    21,179.08/31,771.50 = 7,329.16/x
  3. Step 3: Cross multiply
    21,179.08x = 31,771.50 × 7,329.16
  4. Step 4: Simplify right side
    21,179.08x = 232,858,406.94
  5. Step 5: Solve for x
    x = 232,858,406.94/21,179.08
  6. Step 6: Final answer
    x = 10,994.74

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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.