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Finding the Fourth Proportional to 12,876.48, 17,768.06 and 7,210.44

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Solution

The fourth proportional to 12,876.48, 17,768.06 and 7,210.44 is: 9,949.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,876.48 : 17,768.06 = 7,210.44 : x
  2. Step 2: Convert to fraction form
    12,876.48/17,768.06 = 7,210.44/x
  3. Step 3: Cross multiply
    12,876.48x = 17,768.06 × 7,210.44
  4. Step 4: Simplify right side
    12,876.48x = 128,115,530.55
  5. Step 5: Solve for x
    x = 128,115,530.55/12,876.48
  6. Step 6: Final answer
    x = 9,949.58

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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.