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Finding the Fourth Proportional to 8,378.79, 12,564.81 and 3,635.25

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Solution

The fourth proportional to 8,378.79, 12,564.81 and 3,635.25 is: 5,451.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,378.79 : 12,564.81 = 3,635.25 : x
  2. Step 2: Convert to fraction form
    8,378.79/12,564.81 = 3,635.25/x
  3. Step 3: Cross multiply
    8,378.79x = 12,564.81 × 3,635.25
  4. Step 4: Simplify right side
    8,378.79x = 45,676,225.55
  5. Step 5: Solve for x
    x = 45,676,225.55/8,378.79
  6. Step 6: Final answer
    x = 5,451.41

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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.