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Finding the Fourth Proportional to 36,921.60, 55,389.60 and 15,861.60

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Solution

The fourth proportional to 36,921.60, 55,389.60 and 15,861.60 is: 23,795.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,921.60 : 55,389.60 = 15,861.60 : x
  2. Step 2: Convert to fraction form
    36,921.60/55,389.60 = 15,861.60/x
  3. Step 3: Cross multiply
    36,921.60x = 55,389.60 × 15,861.60
  4. Step 4: Simplify right side
    36,921.60x = 878,567,679.36
  5. Step 5: Solve for x
    x = 878,567,679.36/36,921.60
  6. Step 6: Final answer
    x = 23,795.49

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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.