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Finding the Fourth Proportional to 12,676.28, 19,018.95 and 5,655.67

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Solution

The fourth proportional to 12,676.28, 19,018.95 and 5,655.67 is: 8,485.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,676.28 : 19,018.95 = 5,655.67 : x
  2. Step 2: Convert to fraction form
    12,676.28/19,018.95 = 5,655.67/x
  3. Step 3: Cross multiply
    12,676.28x = 19,018.95 × 5,655.67
  4. Step 4: Simplify right side
    12,676.28x = 107,564,904.95
  5. Step 5: Solve for x
    x = 107,564,904.95/12,676.28
  6. Step 6: Final answer
    x = 8,485.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.