Home / 11,720.40-16,174.14-6,415.20

Finding the Fourth Proportional to 11,720.40, 16,174.14 and 6,415.20

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Solution

The fourth proportional to 11,720.40, 16,174.14 and 6,415.20 is: 8,852.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,720.40 : 16,174.14 = 6,415.20 : x
  2. Step 2: Convert to fraction form
    11,720.40/16,174.14 = 6,415.20/x
  3. Step 3: Cross multiply
    11,720.40x = 16,174.14 × 6,415.20
  4. Step 4: Simplify right side
    11,720.40x = 103,760,342.93
  5. Step 5: Solve for x
    x = 103,760,342.93/11,720.40
  6. Step 6: Final answer
    x = 8,852.97

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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.