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Finding the Fourth Proportional to 14,687.76, 21,976.44 and 8,742.76

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Solution

The fourth proportional to 14,687.76, 21,976.44 and 8,742.76 is: 13,081.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,687.76 : 21,976.44 = 8,742.76 : x
  2. Step 2: Convert to fraction form
    14,687.76/21,976.44 = 8,742.76/x
  3. Step 3: Cross multiply
    14,687.76x = 21,976.44 × 8,742.76
  4. Step 4: Simplify right side
    14,687.76x = 192,134,740.57
  5. Step 5: Solve for x
    x = 192,134,740.57/14,687.76
  6. Step 6: Final answer
    x = 13,081.28

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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.