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Finding the Fourth Proportional to 12,855.78, 19,276.74 and 6,935.84

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Solution

The fourth proportional to 12,855.78, 19,276.74 and 6,935.84 is: 10,400.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,855.78 : 19,276.74 = 6,935.84 : x
  2. Step 2: Convert to fraction form
    12,855.78/19,276.74 = 6,935.84/x
  3. Step 3: Cross multiply
    12,855.78x = 19,276.74 × 6,935.84
  4. Step 4: Simplify right side
    12,855.78x = 133,700,384.36
  5. Step 5: Solve for x
    x = 133,700,384.36/12,855.78
  6. Step 6: Final answer
    x = 10,400.02

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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.