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Finding the Fourth Proportional to 12,639.48, 17,445.94 and 7,336

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Solution

The fourth proportional to 12,639.48, 17,445.94 and 7,336 is: 10,125.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.48 : 17,445.94 = 7,336 : x
  2. Step 2: Convert to fraction form
    12,639.48/17,445.94 = 7,336/x
  3. Step 3: Cross multiply
    12,639.48x = 17,445.94 × 7,336
  4. Step 4: Simplify right side
    12,639.48x = 127,983,415.84
  5. Step 5: Solve for x
    x = 127,983,415.84/12,639.48
  6. Step 6: Final answer
    x = 10,125.69

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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.