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Finding the Fourth Proportional to 11,436.21, 17,124.93 and 7,921.20

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Solution

The fourth proportional to 11,436.21, 17,124.93 and 7,921.20 is: 11,861.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,436.21 : 17,124.93 = 7,921.20 : x
  2. Step 2: Convert to fraction form
    11,436.21/17,124.93 = 7,921.20/x
  3. Step 3: Cross multiply
    11,436.21x = 17,124.93 × 7,921.20
  4. Step 4: Simplify right side
    11,436.21x = 135,649,995.52
  5. Step 5: Solve for x
    x = 135,649,995.52/11,436.21
  6. Step 6: Final answer
    x = 11,861.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.