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Finding the Fourth Proportional to 36,139.68, 54,190.08 and 12,748.68

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Solution

The fourth proportional to 36,139.68, 54,190.08 and 12,748.68 is: 19,116.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,139.68 : 54,190.08 = 12,748.68 : x
  2. Step 2: Convert to fraction form
    36,139.68/54,190.08 = 12,748.68/x
  3. Step 3: Cross multiply
    36,139.68x = 54,190.08 × 12,748.68
  4. Step 4: Simplify right side
    36,139.68x = 690,851,989.09
  5. Step 5: Solve for x
    x = 690,851,989.09/36,139.68
  6. Step 6: Final answer
    x = 19,116.16

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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.