Home / 21,214.38-31,821.60-7,174.44

Finding the Fourth Proportional to 21,214.38, 31,821.60 and 7,174.44

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Solution

The fourth proportional to 21,214.38, 31,821.60 and 7,174.44 is: 10,761.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,214.38 : 31,821.60 = 7,174.44 : x
  2. Step 2: Convert to fraction form
    21,214.38/31,821.60 = 7,174.44/x
  3. Step 3: Cross multiply
    21,214.38x = 31,821.60 × 7,174.44
  4. Step 4: Simplify right side
    21,214.38x = 228,302,159.90
  5. Step 5: Solve for x
    x = 228,302,159.90/21,214.38
  6. Step 6: Final answer
    x = 10,761.67

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1.5x scale

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.