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Finding the Fourth Proportional to 14,765.16, 20,379.16 and 9,179.40

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Solution

The fourth proportional to 14,765.16, 20,379.16 and 9,179.40 is: 12,669.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,765.16 : 20,379.16 = 9,179.40 : x
  2. Step 2: Convert to fraction form
    14,765.16/20,379.16 = 9,179.40/x
  3. Step 3: Cross multiply
    14,765.16x = 20,379.16 × 9,179.40
  4. Step 4: Simplify right side
    14,765.16x = 187,068,461.30
  5. Step 5: Solve for x
    x = 187,068,461.30/14,765.16
  6. Step 6: Final answer
    x = 12,669.59

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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.