Home / 11,972.40-16,520.67-6,666.90

Finding the Fourth Proportional to 11,972.40, 16,520.67 and 6,666.90

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Solution

The fourth proportional to 11,972.40, 16,520.67 and 6,666.90 is: 9,199.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,972.40 : 16,520.67 = 6,666.90 : x
  2. Step 2: Convert to fraction form
    11,972.40/16,520.67 = 6,666.90/x
  3. Step 3: Cross multiply
    11,972.40x = 16,520.67 × 6,666.90
  4. Step 4: Simplify right side
    11,972.40x = 110,141,654.82
  5. Step 5: Solve for x
    x = 110,141,654.82/11,972.40
  6. Step 6: Final answer
    x = 9,199.63

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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.