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Finding the Fourth Proportional to 11,686.49, 16,119.17 and 7,907.99

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Solution

The fourth proportional to 11,686.49, 16,119.17 and 7,907.99 is: 10,907.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,686.49 : 16,119.17 = 7,907.99 : x
  2. Step 2: Convert to fraction form
    11,686.49/16,119.17 = 7,907.99/x
  3. Step 3: Cross multiply
    11,686.49x = 16,119.17 × 7,907.99
  4. Step 4: Simplify right side
    11,686.49x = 127,470,115.03
  5. Step 5: Solve for x
    x = 127,470,115.03/11,686.49
  6. Step 6: Final answer
    x = 10,907.48

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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.