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Finding the Fourth Proportional to 12,665.45, 17,478.99 and 7,631.26

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Solution

The fourth proportional to 12,665.45, 17,478.99 and 7,631.26 is: 10,531.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,665.45 : 17,478.99 = 7,631.26 : x
  2. Step 2: Convert to fraction form
    12,665.45/17,478.99 = 7,631.26/x
  3. Step 3: Cross multiply
    12,665.45x = 17,478.99 × 7,631.26
  4. Step 4: Simplify right side
    12,665.45x = 133,386,717.23
  5. Step 5: Solve for x
    x = 133,386,717.23/12,665.45
  6. Step 6: Final answer
    x = 10,531.54

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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.