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Finding the Fourth Proportional to 11,992.90, 16,555.32 and 7,519.20

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Solution

The fourth proportional to 11,992.90, 16,555.32 and 7,519.20 is: 10,379.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,992.90 : 16,555.32 = 7,519.20 : x
  2. Step 2: Convert to fraction form
    11,992.90/16,555.32 = 7,519.20/x
  3. Step 3: Cross multiply
    11,992.90x = 16,555.32 × 7,519.20
  4. Step 4: Simplify right side
    11,992.90x = 124,482,762.14
  5. Step 5: Solve for x
    x = 124,482,762.14/11,992.90
  6. Step 6: Final answer
    x = 10,379.70

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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.