Home / 20,515.46-30,780.68-8,672.31

Finding the Fourth Proportional to 20,515.46, 30,780.68 and 8,672.31

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Solution

The fourth proportional to 20,515.46, 30,780.68 and 8,672.31 is: 13,011.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.46 : 30,780.68 = 8,672.31 : x
  2. Step 2: Convert to fraction form
    20,515.46/30,780.68 = 8,672.31/x
  3. Step 3: Cross multiply
    20,515.46x = 30,780.68 × 8,672.31
  4. Step 4: Simplify right side
    20,515.46x = 266,939,555.61
  5. Step 5: Solve for x
    x = 266,939,555.61/20,515.46
  6. Step 6: Final answer
    x = 13,011.63

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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.