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Finding the Fourth Proportional to 12,612.47, 18,872.00 and 7,894.90

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Solution

The fourth proportional to 12,612.47, 18,872.00 and 7,894.90 is: 11,813.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,612.47 : 18,872.00 = 7,894.90 : x
  2. Step 2: Convert to fraction form
    12,612.47/18,872.00 = 7,894.90/x
  3. Step 3: Cross multiply
    12,612.47x = 18,872.00 × 7,894.90
  4. Step 4: Simplify right side
    12,612.47x = 148,992,466.15
  5. Step 5: Solve for x
    x = 148,992,466.15/12,612.47
  6. Step 6: Final answer
    x = 11,813.11

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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.