Home / 11,720.72-16,174.56-6,415.52

Finding the Fourth Proportional to 11,720.72, 16,174.56 and 6,415.52

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Solution

The fourth proportional to 11,720.72, 16,174.56 and 6,415.52 is: 8,853.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,720.72 : 16,174.56 = 6,415.52 : x
  2. Step 2: Convert to fraction form
    11,720.72/16,174.56 = 6,415.52/x
  3. Step 3: Cross multiply
    11,720.72x = 16,174.56 × 6,415.52
  4. Step 4: Simplify right side
    11,720.72x = 103,768,213.17
  5. Step 5: Solve for x
    x = 103,768,213.17/11,720.72
  6. Step 6: Final answer
    x = 8,853.40

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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.