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Finding the Fourth Proportional to 12,818.88, 19,208.16 and 6,981.12

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Solution

The fourth proportional to 12,818.88, 19,208.16 and 6,981.12 is: 10,460.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,818.88 : 19,208.16 = 6,981.12 : x
  2. Step 2: Convert to fraction form
    12,818.88/19,208.16 = 6,981.12/x
  3. Step 3: Cross multiply
    12,818.88x = 19,208.16 × 6,981.12
  4. Step 4: Simplify right side
    12,818.88x = 134,094,469.94
  5. Step 5: Solve for x
    x = 134,094,469.94/12,818.88
  6. Step 6: Final answer
    x = 10,460.70

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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.