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Finding the Fourth Proportional to 6,762.40, 9,339.24 and 5,174.80

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Solution

The fourth proportional to 6,762.40, 9,339.24 and 5,174.80 is: 7,146.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,762.40 : 9,339.24 = 5,174.80 : x
  2. Step 2: Convert to fraction form
    6,762.40/9,339.24 = 5,174.80/x
  3. Step 3: Cross multiply
    6,762.40x = 9,339.24 × 5,174.80
  4. Step 4: Simplify right side
    6,762.40x = 48,328,699.15
  5. Step 5: Solve for x
    x = 48,328,699.15/6,762.40
  6. Step 6: Final answer
    x = 7,146.68

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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.