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Finding the Fourth Proportional to 12,239.65, 16,866.52 and 8,692.93

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Solution

The fourth proportional to 12,239.65, 16,866.52 and 8,692.93 is: 11,979.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,239.65 : 16,866.52 = 8,692.93 : x
  2. Step 2: Convert to fraction form
    12,239.65/16,866.52 = 8,692.93/x
  3. Step 3: Cross multiply
    12,239.65x = 16,866.52 × 8,692.93
  4. Step 4: Simplify right side
    12,239.65x = 146,619,477.70
  5. Step 5: Solve for x
    x = 146,619,477.70/12,239.65
  6. Step 6: Final answer
    x = 11,979.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.