Home / 5,185.76-7,778.64-4,140.87

Finding the Fourth Proportional to 5,185.76, 7,778.64 and 4,140.87

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Solution

The fourth proportional to 5,185.76, 7,778.64 and 4,140.87 is: 6,211.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,185.76 : 7,778.64 = 4,140.87 : x
  2. Step 2: Convert to fraction form
    5,185.76/7,778.64 = 4,140.87/x
  3. Step 3: Cross multiply
    5,185.76x = 7,778.64 × 4,140.87
  4. Step 4: Simplify right side
    5,185.76x = 32,210,337.02
  5. Step 5: Solve for x
    x = 32,210,337.02/5,185.76
  6. Step 6: Final answer
    x = 6,211.31

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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.