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Finding the Fourth Proportional to 11,985.79, 16,540.41 and 7,205.79

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Solution

The fourth proportional to 11,985.79, 16,540.41 and 7,205.79 is: 9,944.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,985.79 : 16,540.41 = 7,205.79 : x
  2. Step 2: Convert to fraction form
    11,985.79/16,540.41 = 7,205.79/x
  3. Step 3: Cross multiply
    11,985.79x = 16,540.41 × 7,205.79
  4. Step 4: Simplify right side
    11,985.79x = 119,186,720.97
  5. Step 5: Solve for x
    x = 119,186,720.97/11,985.79
  6. Step 6: Final answer
    x = 9,944.00

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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.