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Finding the Fourth Proportional to 12,175.46, 18,265.65 and 5,155.46

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Solution

The fourth proportional to 12,175.46, 18,265.65 and 5,155.46 is: 7,734.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,175.46 : 18,265.65 = 5,155.46 : x
  2. Step 2: Convert to fraction form
    12,175.46/18,265.65 = 5,155.46/x
  3. Step 3: Cross multiply
    12,175.46x = 18,265.65 × 5,155.46
  4. Step 4: Simplify right side
    12,175.46x = 94,167,827.95
  5. Step 5: Solve for x
    x = 94,167,827.95/12,175.46
  6. Step 6: Final answer
    x = 7,734.23

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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.