Home / 54,430.35-81,643.68-21,157.89

Finding the Fourth Proportional to 54,430.35, 81,643.68 and 21,157.89

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Solution

The fourth proportional to 54,430.35, 81,643.68 and 21,157.89 is: 31,736.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,430.35 : 81,643.68 = 21,157.89 : x
  2. Step 2: Convert to fraction form
    54,430.35/81,643.68 = 21,157.89/x
  3. Step 3: Cross multiply
    54,430.35x = 81,643.68 × 21,157.89
  4. Step 4: Simplify right side
    54,430.35x = 1,727,408,000.64
  5. Step 5: Solve for x
    x = 1,727,408,000.64/54,430.35
  6. Step 6: Final answer
    x = 31,736.12

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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.