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Finding the Fourth Proportional to 6,486.68, 8,958.20 and 5,588.60

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Solution

The fourth proportional to 6,486.68, 8,958.20 and 5,588.60 is: 7,717.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,486.68 : 8,958.20 = 5,588.60 : x
  2. Step 2: Convert to fraction form
    6,486.68/8,958.20 = 5,588.60/x
  3. Step 3: Cross multiply
    6,486.68x = 8,958.20 × 5,588.60
  4. Step 4: Simplify right side
    6,486.68x = 50,063,723.79
  5. Step 5: Solve for x
    x = 50,063,723.79/6,486.68
  6. Step 6: Final answer
    x = 7,717.92

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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.