Home / 13,724.82-18,928.98-8,415.90

Finding the Fourth Proportional to 13,724.82, 18,928.98 and 8,415.90

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Solution

The fourth proportional to 13,724.82, 18,928.98 and 8,415.90 is: 11,607.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,724.82 : 18,928.98 = 8,415.90 : x
  2. Step 2: Convert to fraction form
    13,724.82/18,928.98 = 8,415.90/x
  3. Step 3: Cross multiply
    13,724.82x = 18,928.98 × 8,415.90
  4. Step 4: Simplify right side
    13,724.82x = 159,304,402.78
  5. Step 5: Solve for x
    x = 159,304,402.78/13,724.82
  6. Step 6: Final answer
    x = 11,607.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.