Home / 13,605.84-20,408.80-4,378.32

Finding the Fourth Proportional to 13,605.84, 20,408.80 and 4,378.32

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Solution

The fourth proportional to 13,605.84, 20,408.80 and 4,378.32 is: 6,567.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,605.84 : 20,408.80 = 4,378.32 : x
  2. Step 2: Convert to fraction form
    13,605.84/20,408.80 = 4,378.32/x
  3. Step 3: Cross multiply
    13,605.84x = 20,408.80 × 4,378.32
  4. Step 4: Simplify right side
    13,605.84x = 89,356,257.22
  5. Step 5: Solve for x
    x = 89,356,257.22/13,605.84
  6. Step 6: Final answer
    x = 6,567.49

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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.