Home / 20,751.84-31,122.72-6,899.04

Finding the Fourth Proportional to 20,751.84, 31,122.72 and 6,899.04

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Solution

The fourth proportional to 20,751.84, 31,122.72 and 6,899.04 is: 10,346.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,751.84 : 31,122.72 = 6,899.04 : x
  2. Step 2: Convert to fraction form
    20,751.84/31,122.72 = 6,899.04/x
  3. Step 3: Cross multiply
    20,751.84x = 31,122.72 × 6,899.04
  4. Step 4: Simplify right side
    20,751.84x = 214,716,890.19
  5. Step 5: Solve for x
    x = 214,716,890.19/20,751.84
  6. Step 6: Final answer
    x = 10,346.88

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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.