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Finding the Fourth Proportional to 12,876.49, 17,768.07 and 7,210.45

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Solution

The fourth proportional to 12,876.49, 17,768.07 and 7,210.45 is: 9,949.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,876.49 : 17,768.07 = 7,210.45 : x
  2. Step 2: Convert to fraction form
    12,876.49/17,768.07 = 7,210.45/x
  3. Step 3: Cross multiply
    12,876.49x = 17,768.07 × 7,210.45
  4. Step 4: Simplify right side
    12,876.49x = 128,115,780.33
  5. Step 5: Solve for x
    x = 128,115,780.33/12,876.49
  6. Step 6: Final answer
    x = 9,949.59

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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.