Home / 14,748.20-22,128.78-7,821

Finding the Fourth Proportional to 14,748.20, 22,128.78 and 7,821

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Solution

The fourth proportional to 14,748.20, 22,128.78 and 7,821 is: 11,734.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,748.20 : 22,128.78 = 7,821 : x
  2. Step 2: Convert to fraction form
    14,748.20/22,128.78 = 7,821/x
  3. Step 3: Cross multiply
    14,748.20x = 22,128.78 × 7,821
  4. Step 4: Simplify right side
    14,748.20x = 173,069,188.38
  5. Step 5: Solve for x
    x = 173,069,188.38/14,748.20
  6. Step 6: Final answer
    x = 11,734.94

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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.