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Finding the Fourth Proportional to 12,876.92, 17,768.68 and 7,210.88

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Solution

The fourth proportional to 12,876.92, 17,768.68 and 7,210.88 is: 9,950.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,876.92 : 17,768.68 = 7,210.88 : x
  2. Step 2: Convert to fraction form
    12,876.92/17,768.68 = 7,210.88/x
  3. Step 3: Cross multiply
    12,876.92x = 17,768.68 × 7,210.88
  4. Step 4: Simplify right side
    12,876.92x = 128,127,819.24
  5. Step 5: Solve for x
    x = 128,127,819.24/12,876.92
  6. Step 6: Final answer
    x = 9,950.19

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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.