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Finding the Fourth Proportional to 54,739.70, 82,109.40 and 13,186.70

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Solution

The fourth proportional to 54,739.70, 82,109.40 and 13,186.70 is: 19,780.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,739.70 : 82,109.40 = 13,186.70 : x
  2. Step 2: Convert to fraction form
    54,739.70/82,109.40 = 13,186.70/x
  3. Step 3: Cross multiply
    54,739.70x = 82,109.40 × 13,186.70
  4. Step 4: Simplify right side
    54,739.70x = 1,082,751,872.89
  5. Step 5: Solve for x
    x = 1,082,751,872.89/54,739.70
  6. Step 6: Final answer
    x = 19,780.01

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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.