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Finding the Fourth Proportional to 11,695.09, 16,138.75 and 6,390.09

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Solution

The fourth proportional to 11,695.09, 16,138.75 and 6,390.09 is: 8,818.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,695.09 : 16,138.75 = 6,390.09 : x
  2. Step 2: Convert to fraction form
    11,695.09/16,138.75 = 6,390.09/x
  3. Step 3: Cross multiply
    11,695.09x = 16,138.75 × 6,390.09
  4. Step 4: Simplify right side
    11,695.09x = 103,128,064.99
  5. Step 5: Solve for x
    x = 103,128,064.99/11,695.09
  6. Step 6: Final answer
    x = 8,818.07

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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.