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Finding the Fourth Proportional to 12,855.85, 19,263.83 and 8,914.79

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Solution

The fourth proportional to 12,855.85, 19,263.83 and 8,914.79 is: 13,358.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,855.85 : 19,263.83 = 8,914.79 : x
  2. Step 2: Convert to fraction form
    12,855.85/19,263.83 = 8,914.79/x
  3. Step 3: Cross multiply
    12,855.85x = 19,263.83 × 8,914.79
  4. Step 4: Simplify right side
    12,855.85x = 171,733,002.63
  5. Step 5: Solve for x
    x = 171,733,002.63/12,855.85
  6. Step 6: Final answer
    x = 13,358.36

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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.