Home / 5,147.10-7,720.65-4,223.70

Finding the Fourth Proportional to 5,147.10, 7,720.65 and 4,223.70

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Solution

The fourth proportional to 5,147.10, 7,720.65 and 4,223.70 is: 6,335.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,147.10 : 7,720.65 = 4,223.70 : x
  2. Step 2: Convert to fraction form
    5,147.10/7,720.65 = 4,223.70/x
  3. Step 3: Cross multiply
    5,147.10x = 7,720.65 × 4,223.70
  4. Step 4: Simplify right side
    5,147.10x = 32,609,709.41
  5. Step 5: Solve for x
    x = 32,609,709.41/5,147.10
  6. Step 6: Final answer
    x = 6,335.55

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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.