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Finding the Fourth Proportional to 8,477.87, 12,715.99 and 5,189.27

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Solution

The fourth proportional to 8,477.87, 12,715.99 and 5,189.27 is: 7,783.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,477.87 : 12,715.99 = 5,189.27 : x
  2. Step 2: Convert to fraction form
    8,477.87/12,715.99 = 5,189.27/x
  3. Step 3: Cross multiply
    8,477.87x = 12,715.99 × 5,189.27
  4. Step 4: Simplify right side
    8,477.87x = 65,986,628.87
  5. Step 5: Solve for x
    x = 65,986,628.87/8,477.87
  6. Step 6: Final answer
    x = 7,783.40

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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.