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Finding the Fourth Proportional to 12,803, 17,668.14 and 6,915

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Solution

The fourth proportional to 12,803, 17,668.14 and 6,915 is: 9,542.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,803 : 17,668.14 = 6,915 : x
  2. Step 2: Convert to fraction form
    12,803/17,668.14 = 6,915/x
  3. Step 3: Cross multiply
    12,803x = 17,668.14 × 6,915
  4. Step 4: Simplify right side
    12,803x = 122,175,188.10
  5. Step 5: Solve for x
    x = 122,175,188.10/12,803
  6. Step 6: Final answer
    x = 9,542.70

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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.