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Finding the Fourth Proportional to 8,778.56, 13,154.72 and 8,130.56

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Solution

The fourth proportional to 8,778.56, 13,154.72 and 8,130.56 is: 12,183.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,778.56 : 13,154.72 = 8,130.56 : x
  2. Step 2: Convert to fraction form
    8,778.56/13,154.72 = 8,130.56/x
  3. Step 3: Cross multiply
    8,778.56x = 13,154.72 × 8,130.56
  4. Step 4: Simplify right side
    8,778.56x = 106,955,240.24
  5. Step 5: Solve for x
    x = 106,955,240.24/8,778.56
  6. Step 6: Final answer
    x = 12,183.69

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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.