Home / 12,231.64-16,855.50-8,688.70

Finding the Fourth Proportional to 12,231.64, 16,855.50 and 8,688.70

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Solution

The fourth proportional to 12,231.64, 16,855.50 and 8,688.70 is: 11,973.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,231.64 : 16,855.50 = 8,688.70 : x
  2. Step 2: Convert to fraction form
    12,231.64/16,855.50 = 8,688.70/x
  3. Step 3: Cross multiply
    12,231.64x = 16,855.50 × 8,688.70
  4. Step 4: Simplify right side
    12,231.64x = 146,452,382.85
  5. Step 5: Solve for x
    x = 146,452,382.85/12,231.64
  6. Step 6: Final answer
    x = 11,973.24

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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.