Home / 20,505.45-30,752.70-8,815.93

Finding the Fourth Proportional to 20,505.45, 30,752.70 and 8,815.93

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Solution

The fourth proportional to 20,505.45, 30,752.70 and 8,815.93 is: 13,221.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,505.45 : 30,752.70 = 8,815.93 : x
  2. Step 2: Convert to fraction form
    20,505.45/30,752.70 = 8,815.93/x
  3. Step 3: Cross multiply
    20,505.45x = 30,752.70 × 8,815.93
  4. Step 4: Simplify right side
    20,505.45x = 271,113,650.51
  5. Step 5: Solve for x
    x = 271,113,650.51/20,505.45
  6. Step 6: Final answer
    x = 13,221.54

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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.