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Finding the Fourth Proportional to 7,758.60, 11,621.70 and 5,808.12

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Solution

The fourth proportional to 7,758.60, 11,621.70 and 5,808.12 is: 8,700.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,758.60 : 11,621.70 = 5,808.12 : x
  2. Step 2: Convert to fraction form
    7,758.60/11,621.70 = 5,808.12/x
  3. Step 3: Cross multiply
    7,758.60x = 11,621.70 × 5,808.12
  4. Step 4: Simplify right side
    7,758.60x = 67,500,228.20
  5. Step 5: Solve for x
    x = 67,500,228.20/7,758.60
  6. Step 6: Final answer
    x = 8,700.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.