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Finding the Fourth Proportional to 14,428.64, 19,911.80 and 8,141.16

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Solution

The fourth proportional to 14,428.64, 19,911.80 and 8,141.16 is: 11,234.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,428.64 : 19,911.80 = 8,141.16 : x
  2. Step 2: Convert to fraction form
    14,428.64/19,911.80 = 8,141.16/x
  3. Step 3: Cross multiply
    14,428.64x = 19,911.80 × 8,141.16
  4. Step 4: Simplify right side
    14,428.64x = 162,105,149.69
  5. Step 5: Solve for x
    x = 162,105,149.69/14,428.64
  6. Step 6: Final answer
    x = 11,234.96

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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.