Home / 5,217.86-7,200.87-3,121.58

Finding the Fourth Proportional to 5,217.86, 7,200.87 and 3,121.58

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Solution

The fourth proportional to 5,217.86, 7,200.87 and 3,121.58 is: 4,307.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,217.86 : 7,200.87 = 3,121.58 : x
  2. Step 2: Convert to fraction form
    5,217.86/7,200.87 = 3,121.58/x
  3. Step 3: Cross multiply
    5,217.86x = 7,200.87 × 3,121.58
  4. Step 4: Simplify right side
    5,217.86x = 22,478,091.77
  5. Step 5: Solve for x
    x = 22,478,091.77/5,217.86
  6. Step 6: Final answer
    x = 4,307.91

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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.