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Finding the Fourth Proportional to 14,978.45, 20,676.89 and 9,675.85

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Solution

The fourth proportional to 14,978.45, 20,676.89 and 9,675.85 is: 13,356.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,978.45 : 20,676.89 = 9,675.85 : x
  2. Step 2: Convert to fraction form
    14,978.45/20,676.89 = 9,675.85/x
  3. Step 3: Cross multiply
    14,978.45x = 20,676.89 × 9,675.85
  4. Step 4: Simplify right side
    14,978.45x = 200,066,486.11
  5. Step 5: Solve for x
    x = 200,066,486.11/14,978.45
  6. Step 6: Final answer
    x = 13,356.96

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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.