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Finding the Fourth Proportional to 36,861.60, 55,292.40 and 20,215.20

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Solution

The fourth proportional to 36,861.60, 55,292.40 and 20,215.20 is: 30,322.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,861.60 : 55,292.40 = 20,215.20 : x
  2. Step 2: Convert to fraction form
    36,861.60/55,292.40 = 20,215.20/x
  3. Step 3: Cross multiply
    36,861.60x = 55,292.40 × 20,215.20
  4. Step 4: Simplify right side
    36,861.60x = 1,117,746,924.48
  5. Step 5: Solve for x
    x = 1,117,746,924.48/36,861.60
  6. Step 6: Final answer
    x = 30,322.80

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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.