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Finding the Fourth Proportional to 12,495, 18,766.32 and 7,240.56

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Solution

The fourth proportional to 12,495, 18,766.32 and 7,240.56 is: 10,874.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,495 : 18,766.32 = 7,240.56 : x
  2. Step 2: Convert to fraction form
    12,495/18,766.32 = 7,240.56/x
  3. Step 3: Cross multiply
    12,495x = 18,766.32 × 7,240.56
  4. Step 4: Simplify right side
    12,495x = 135,878,665.94
  5. Step 5: Solve for x
    x = 135,878,665.94/12,495
  6. Step 6: Final answer
    x = 10,874.64

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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.