Home / 43,138.98-64,675.53-13,539.69

Finding the Fourth Proportional to 43,138.98, 64,675.53 and 13,539.69

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Solution

The fourth proportional to 43,138.98, 64,675.53 and 13,539.69 is: 20,299.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,138.98 : 64,675.53 = 13,539.69 : x
  2. Step 2: Convert to fraction form
    43,138.98/64,675.53 = 13,539.69/x
  3. Step 3: Cross multiply
    43,138.98x = 64,675.53 × 13,539.69
  4. Step 4: Simplify right side
    43,138.98x = 875,686,626.79
  5. Step 5: Solve for x
    x = 875,686,626.79/43,138.98
  6. Step 6: Final answer
    x = 20,299.20

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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.