Home / 5,155.98-7,115.30-2,798.16

Finding the Fourth Proportional to 5,155.98, 7,115.30 and 2,798.16

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Solution

The fourth proportional to 5,155.98, 7,115.30 and 2,798.16 is: 3,861.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,155.98 : 7,115.30 = 2,798.16 : x
  2. Step 2: Convert to fraction form
    5,155.98/7,115.30 = 2,798.16/x
  3. Step 3: Cross multiply
    5,155.98x = 7,115.30 × 2,798.16
  4. Step 4: Simplify right side
    5,155.98x = 19,909,747.85
  5. Step 5: Solve for x
    x = 19,909,747.85/5,155.98
  6. Step 6: Final answer
    x = 3,861.49

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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.