Home / 20,518.45-30,780.97-8,672.34

Finding the Fourth Proportional to 20,518.45, 30,780.97 and 8,672.34

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Solution

The fourth proportional to 20,518.45, 30,780.97 and 8,672.34 is: 13,009.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.45 : 30,780.97 = 8,672.34 : x
  2. Step 2: Convert to fraction form
    20,518.45/30,780.97 = 8,672.34/x
  3. Step 3: Cross multiply
    20,518.45x = 30,780.97 × 8,672.34
  4. Step 4: Simplify right side
    20,518.45x = 266,943,037.37
  5. Step 5: Solve for x
    x = 266,943,037.37/20,518.45
  6. Step 6: Final answer
    x = 13,009.90

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1.5x scale

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.