Home / 20,576.15-28,395-11,144.70

Finding the Fourth Proportional to 20,576.15, 28,395 and 11,144.70

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Solution

The fourth proportional to 20,576.15, 28,395 and 11,144.70 is: 15,379.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,576.15 : 28,395 = 11,144.70 : x
  2. Step 2: Convert to fraction form
    20,576.15/28,395 = 11,144.70/x
  3. Step 3: Cross multiply
    20,576.15x = 28,395 × 11,144.70
  4. Step 4: Simplify right side
    20,576.15x = 316,453,756.50
  5. Step 5: Solve for x
    x = 316,453,756.50/20,576.15
  6. Step 6: Final answer
    x = 15,379.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.