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Finding the Fourth Proportional to 12,604.85, 18,905.64 and 5,208.32

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Solution

The fourth proportional to 12,604.85, 18,905.64 and 5,208.32 is: 7,811.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,604.85 : 18,905.64 = 5,208.32 : x
  2. Step 2: Convert to fraction form
    12,604.85/18,905.64 = 5,208.32/x
  3. Step 3: Cross multiply
    12,604.85x = 18,905.64 × 5,208.32
  4. Step 4: Simplify right side
    12,604.85x = 98,466,528.40
  5. Step 5: Solve for x
    x = 98,466,528.40/12,604.85
  6. Step 6: Final answer
    x = 7,811.80

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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.