Home / 13,947.50-20,923.20-4,087.50

Finding the Fourth Proportional to 13,947.50, 20,923.20 and 4,087.50

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Solution

The fourth proportional to 13,947.50, 20,923.20 and 4,087.50 is: 6,131.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,947.50 : 20,923.20 = 4,087.50 : x
  2. Step 2: Convert to fraction form
    13,947.50/20,923.20 = 4,087.50/x
  3. Step 3: Cross multiply
    13,947.50x = 20,923.20 × 4,087.50
  4. Step 4: Simplify right side
    13,947.50x = 85,523,580
  5. Step 5: Solve for x
    x = 85,523,580/13,947.50
  6. Step 6: Final answer
    x = 6,131.82

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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.