Home / 6,455.18-8,911.80-4,939.90

Finding the Fourth Proportional to 6,455.18, 8,911.80 and 4,939.90

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Solution

The fourth proportional to 6,455.18, 8,911.80 and 4,939.90 is: 6,819.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,455.18 : 8,911.80 = 4,939.90 : x
  2. Step 2: Convert to fraction form
    6,455.18/8,911.80 = 4,939.90/x
  3. Step 3: Cross multiply
    6,455.18x = 8,911.80 × 4,939.90
  4. Step 4: Simplify right side
    6,455.18x = 44,023,400.82
  5. Step 5: Solve for x
    x = 44,023,400.82/6,455.18
  6. Step 6: Final answer
    x = 6,819.86

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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.