Home / 5,155.85-7,115.08-2,798.00

Finding the Fourth Proportional to 5,155.85, 7,115.08 and 2,798.00

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Solution

The fourth proportional to 5,155.85, 7,115.08 and 2,798.00 is: 3,861.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,155.85 : 7,115.08 = 2,798.00 : x
  2. Step 2: Convert to fraction form
    5,155.85/7,115.08 = 2,798.00/x
  3. Step 3: Cross multiply
    5,155.85x = 7,115.08 × 2,798.00
  4. Step 4: Simplify right side
    5,155.85x = 19,907,968.76
  5. Step 5: Solve for x
    x = 19,907,968.76/5,155.85
  6. Step 6: Final answer
    x = 3,861.24

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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.