Home / 43,185.12-64,780-13,605.27

Finding the Fourth Proportional to 43,185.12, 64,780 and 13,605.27

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Solution

The fourth proportional to 43,185.12, 64,780 and 13,605.27 is: 20,408.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,185.12 : 64,780 = 13,605.27 : x
  2. Step 2: Convert to fraction form
    43,185.12/64,780 = 13,605.27/x
  3. Step 3: Cross multiply
    43,185.12x = 64,780 × 13,605.27
  4. Step 4: Simplify right side
    43,185.12x = 881,349,390.60
  5. Step 5: Solve for x
    x = 881,349,390.60/43,185.12
  6. Step 6: Final answer
    x = 20,408.64

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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.