Home / 8,716.88-12,027.48-5,178.80

Finding the Fourth Proportional to 8,716.88, 12,027.48 and 5,178.80

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Solution

The fourth proportional to 8,716.88, 12,027.48 and 5,178.80 is: 7,145.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,716.88 : 12,027.48 = 5,178.80 : x
  2. Step 2: Convert to fraction form
    8,716.88/12,027.48 = 5,178.80/x
  3. Step 3: Cross multiply
    8,716.88x = 12,027.48 × 5,178.80
  4. Step 4: Simplify right side
    8,716.88x = 62,287,913.42
  5. Step 5: Solve for x
    x = 62,287,913.42/8,716.88
  6. Step 6: Final answer
    x = 7,145.67

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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.