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Finding the Fourth Proportional to 12,495.87, 18,723.04 and 8,790.32

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Solution

The fourth proportional to 12,495.87, 18,723.04 and 8,790.32 is: 13,170.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,495.87 : 18,723.04 = 8,790.32 : x
  2. Step 2: Convert to fraction form
    12,495.87/18,723.04 = 8,790.32/x
  3. Step 3: Cross multiply
    12,495.87x = 18,723.04 × 8,790.32
  4. Step 4: Simplify right side
    12,495.87x = 164,581,537.80
  5. Step 5: Solve for x
    x = 164,581,537.80/12,495.87
  6. Step 6: Final answer
    x = 13,170.87

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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.