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Finding the Fourth Proportional to 11,920.20, 16,699.80 and 11,920.20

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Solution

The fourth proportional to 11,920.20, 16,699.80 and 11,920.20 is: 16,699.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,920.20 : 16,699.80 = 11,920.20 : x
  2. Step 2: Convert to fraction form
    11,920.20/16,699.80 = 11,920.20/x
  3. Step 3: Cross multiply
    11,920.20x = 16,699.80 × 11,920.20
  4. Step 4: Simplify right side
    11,920.20x = 199,064,955.96
  5. Step 5: Solve for x
    x = 199,064,955.96/11,920.20
  6. Step 6: Final answer
    x = 16,699.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.