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Finding the Fourth Proportional to 11,693.99, 16,138.05 and 6,389.15

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Solution

The fourth proportional to 11,693.99, 16,138.05 and 6,389.15 is: 8,817.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,693.99 : 16,138.05 = 6,389.15 : x
  2. Step 2: Convert to fraction form
    11,693.99/16,138.05 = 6,389.15/x
  3. Step 3: Cross multiply
    11,693.99x = 16,138.05 × 6,389.15
  4. Step 4: Simplify right side
    11,693.99x = 103,108,341.47
  5. Step 5: Solve for x
    x = 103,108,341.47/11,693.99
  6. Step 6: Final answer
    x = 8,817.21

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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.