Home / 7,128.21-9,834.96-4,890.66

Finding the Fourth Proportional to 7,128.21, 9,834.96 and 4,890.66

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Solution

The fourth proportional to 7,128.21, 9,834.96 and 4,890.66 is: 6,747.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.21 : 9,834.96 = 4,890.66 : x
  2. Step 2: Convert to fraction form
    7,128.21/9,834.96 = 4,890.66/x
  3. Step 3: Cross multiply
    7,128.21x = 9,834.96 × 4,890.66
  4. Step 4: Simplify right side
    7,128.21x = 48,099,445.47
  5. Step 5: Solve for x
    x = 48,099,445.47/7,128.21
  6. Step 6: Final answer
    x = 6,747.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.