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Finding the Fourth Proportional to 6,500.86, 8,980.37 and 5,172.86

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Solution

The fourth proportional to 6,500.86, 8,980.37 and 5,172.86 is: 7,145.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,500.86 : 8,980.37 = 5,172.86 : x
  2. Step 2: Convert to fraction form
    6,500.86/8,980.37 = 5,172.86/x
  3. Step 3: Cross multiply
    6,500.86x = 8,980.37 × 5,172.86
  4. Step 4: Simplify right side
    6,500.86x = 46,454,212.74
  5. Step 5: Solve for x
    x = 46,454,212.74/6,500.86
  6. Step 6: Final answer
    x = 7,145.86

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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.