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Finding the Fourth Proportional to 8,291.40, 12,426.62 and 4,824.60

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Solution

The fourth proportional to 8,291.40, 12,426.62 and 4,824.60 is: 7,230.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,291.40 : 12,426.62 = 4,824.60 : x
  2. Step 2: Convert to fraction form
    8,291.40/12,426.62 = 4,824.60/x
  3. Step 3: Cross multiply
    8,291.40x = 12,426.62 × 4,824.60
  4. Step 4: Simplify right side
    8,291.40x = 59,953,470.85
  5. Step 5: Solve for x
    x = 59,953,470.85/8,291.40
  6. Step 6: Final answer
    x = 7,230.80

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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.