Home / 11,720.72-16,174.64-6,415.56

Finding the Fourth Proportional to 11,720.72, 16,174.64 and 6,415.56

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Solution

The fourth proportional to 11,720.72, 16,174.64 and 6,415.56 is: 8,853.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,720.72 : 16,174.64 = 6,415.56 : x
  2. Step 2: Convert to fraction form
    11,720.72/16,174.64 = 6,415.56/x
  3. Step 3: Cross multiply
    11,720.72x = 16,174.64 × 6,415.56
  4. Step 4: Simplify right side
    11,720.72x = 103,769,373.40
  5. Step 5: Solve for x
    x = 103,769,373.40/11,720.72
  6. Step 6: Final answer
    x = 8,853.50

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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.