Home / 18,780.47-28,180.40-8,257.86

Finding the Fourth Proportional to 18,780.47, 28,180.40 and 8,257.86

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Solution

The fourth proportional to 18,780.47, 28,180.40 and 8,257.86 is: 12,391.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,780.47 : 28,180.40 = 8,257.86 : x
  2. Step 2: Convert to fraction form
    18,780.47/28,180.40 = 8,257.86/x
  3. Step 3: Cross multiply
    18,780.47x = 28,180.40 × 8,257.86
  4. Step 4: Simplify right side
    18,780.47x = 232,709,756.65
  5. Step 5: Solve for x
    x = 232,709,756.65/18,780.47
  6. Step 6: Final answer
    x = 12,391.05

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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.