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Finding the Fourth Proportional to 14,768.16, 20,379.76 and 8,144.16

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Solution

The fourth proportional to 14,768.16, 20,379.76 and 8,144.16 is: 11,238.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,768.16 : 20,379.76 = 8,144.16 : x
  2. Step 2: Convert to fraction form
    14,768.16/20,379.76 = 8,144.16/x
  3. Step 3: Cross multiply
    14,768.16x = 20,379.76 × 8,144.16
  4. Step 4: Simplify right side
    14,768.16x = 165,976,026.20
  5. Step 5: Solve for x
    x = 165,976,026.20/14,768.16
  6. Step 6: Final answer
    x = 11,238.77

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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.