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Finding the Fourth Proportional to 12,445.65, 18,665.73 and 7,169.49

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Solution

The fourth proportional to 12,445.65, 18,665.73 and 7,169.49 is: 10,752.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,445.65 : 18,665.73 = 7,169.49 : x
  2. Step 2: Convert to fraction form
    12,445.65/18,665.73 = 7,169.49/x
  3. Step 3: Cross multiply
    12,445.65x = 18,665.73 × 7,169.49
  4. Step 4: Simplify right side
    12,445.65x = 133,823,764.58
  5. Step 5: Solve for x
    x = 133,823,764.58/12,445.65
  6. Step 6: Final answer
    x = 10,752.65

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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.