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Finding the Fourth Proportional to 14,967.66, 20,655 and 8,679.63

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Solution

The fourth proportional to 14,967.66, 20,655 and 8,679.63 is: 11,977.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,967.66 : 20,655 = 8,679.63 : x
  2. Step 2: Convert to fraction form
    14,967.66/20,655 = 8,679.63/x
  3. Step 3: Cross multiply
    14,967.66x = 20,655 × 8,679.63
  4. Step 4: Simplify right side
    14,967.66x = 179,277,757.65
  5. Step 5: Solve for x
    x = 179,277,757.65/14,967.66
  6. Step 6: Final answer
    x = 11,977.67

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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.