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Finding the Fourth Proportional to 11,421.71, 17,141.70 and 11,057.21

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Solution

The fourth proportional to 11,421.71, 17,141.70 and 11,057.21 is: 16,594.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,421.71 : 17,141.70 = 11,057.21 : x
  2. Step 2: Convert to fraction form
    11,421.71/17,141.70 = 11,057.21/x
  3. Step 3: Cross multiply
    11,421.71x = 17,141.70 × 11,057.21
  4. Step 4: Simplify right side
    11,421.71x = 189,539,460.98
  5. Step 5: Solve for x
    x = 189,539,460.98/11,421.71
  6. Step 6: Final answer
    x = 16,594.66

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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.