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Finding the Fourth Proportional to 8,347.20, 12,520.40 and 2,800.64

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Solution

The fourth proportional to 8,347.20, 12,520.40 and 2,800.64 is: 4,200.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,347.20 : 12,520.40 = 2,800.64 : x
  2. Step 2: Convert to fraction form
    8,347.20/12,520.40 = 2,800.64/x
  3. Step 3: Cross multiply
    8,347.20x = 12,520.40 × 2,800.64
  4. Step 4: Simplify right side
    8,347.20x = 35,065,133.06
  5. Step 5: Solve for x
    x = 35,065,133.06/8,347.20
  6. Step 6: Final answer
    x = 4,200.83

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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.