Home / 9,311.96-12,855.48-5,778.20

Finding the Fourth Proportional to 9,311.96, 12,855.48 and 5,778.20

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Solution

The fourth proportional to 9,311.96, 12,855.48 and 5,778.20 is: 7,977.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,311.96 : 12,855.48 = 5,778.20 : x
  2. Step 2: Convert to fraction form
    9,311.96/12,855.48 = 5,778.20/x
  3. Step 3: Cross multiply
    9,311.96x = 12,855.48 × 5,778.20
  4. Step 4: Simplify right side
    9,311.96x = 74,281,534.54
  5. Step 5: Solve for x
    x = 74,281,534.54/9,311.96
  6. Step 6: Final answer
    x = 7,977.00

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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.