Home / 12,721.78-17,553.80-7,682.63

Finding the Fourth Proportional to 12,721.78, 17,553.80 and 7,682.63

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Solution

The fourth proportional to 12,721.78, 17,553.80 and 7,682.63 is: 10,600.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.78 : 17,553.80 = 7,682.63 : x
  2. Step 2: Convert to fraction form
    12,721.78/17,553.80 = 7,682.63/x
  3. Step 3: Cross multiply
    12,721.78x = 17,553.80 × 7,682.63
  4. Step 4: Simplify right side
    12,721.78x = 134,859,350.49
  5. Step 5: Solve for x
    x = 134,859,350.49/12,721.78
  6. Step 6: Final answer
    x = 10,600.67

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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.