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Finding the Fourth Proportional to 12,390.85, 18,604.73 and 5,009.72

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Solution

The fourth proportional to 12,390.85, 18,604.73 and 5,009.72 is: 7,522.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.85 : 18,604.73 = 5,009.72 : x
  2. Step 2: Convert to fraction form
    12,390.85/18,604.73 = 5,009.72/x
  3. Step 3: Cross multiply
    12,390.85x = 18,604.73 × 5,009.72
  4. Step 4: Simplify right side
    12,390.85x = 93,204,509.44
  5. Step 5: Solve for x
    x = 93,204,509.44/12,390.85
  6. Step 6: Final answer
    x = 7,522.04

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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.