Home / 13,818.84-20,728.08-3,430.50

Finding the Fourth Proportional to 13,818.84, 20,728.08 and 3,430.50

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Solution

The fourth proportional to 13,818.84, 20,728.08 and 3,430.50 is: 5,145.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,818.84 : 20,728.08 = 3,430.50 : x
  2. Step 2: Convert to fraction form
    13,818.84/20,728.08 = 3,430.50/x
  3. Step 3: Cross multiply
    13,818.84x = 20,728.08 × 3,430.50
  4. Step 4: Simplify right side
    13,818.84x = 71,107,678.44
  5. Step 5: Solve for x
    x = 71,107,678.44/13,818.84
  6. Step 6: Final answer
    x = 5,145.71

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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.