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Finding the Fourth Proportional to 11,494.74, 15,867.37 and 7,720.11

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Solution

The fourth proportional to 11,494.74, 15,867.37 and 7,720.11 is: 10,656.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,494.74 : 15,867.37 = 7,720.11 : x
  2. Step 2: Convert to fraction form
    11,494.74/15,867.37 = 7,720.11/x
  3. Step 3: Cross multiply
    11,494.74x = 15,867.37 × 7,720.11
  4. Step 4: Simplify right side
    11,494.74x = 122,497,829.75
  5. Step 5: Solve for x
    x = 122,497,829.75/11,494.74
  6. Step 6: Final answer
    x = 10,656.86

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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.