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Finding the Fourth Proportional to 12,581.99, 18,857.87 and 8,878.67

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Solution

The fourth proportional to 12,581.99, 18,857.87 and 8,878.67 is: 13,307.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,581.99 : 18,857.87 = 8,878.67 : x
  2. Step 2: Convert to fraction form
    12,581.99/18,857.87 = 8,878.67/x
  3. Step 3: Cross multiply
    12,581.99x = 18,857.87 × 8,878.67
  4. Step 4: Simplify right side
    12,581.99x = 167,432,760.24
  5. Step 5: Solve for x
    x = 167,432,760.24/12,581.99
  6. Step 6: Final answer
    x = 13,307.34

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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.