Home / 28,780.20-43,176.13-12,140.28

Finding the Fourth Proportional to 28,780.20, 43,176.13 and 12,140.28

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Solution

The fourth proportional to 28,780.20, 43,176.13 and 12,140.28 is: 18,212.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,780.20 : 43,176.13 = 12,140.28 : x
  2. Step 2: Convert to fraction form
    28,780.20/43,176.13 = 12,140.28/x
  3. Step 3: Cross multiply
    28,780.20x = 43,176.13 × 12,140.28
  4. Step 4: Simplify right side
    28,780.20x = 524,170,260.09
  5. Step 5: Solve for x
    x = 524,170,260.09/28,780.20
  6. Step 6: Final answer
    x = 18,212.88

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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.