Home / 13,352.80-20,000.40-8,687.20

Finding the Fourth Proportional to 13,352.80, 20,000.40 and 8,687.20

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Solution

The fourth proportional to 13,352.80, 20,000.40 and 8,687.20 is: 13,012.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,352.80 : 20,000.40 = 8,687.20 : x
  2. Step 2: Convert to fraction form
    13,352.80/20,000.40 = 8,687.20/x
  3. Step 3: Cross multiply
    13,352.80x = 20,000.40 × 8,687.20
  4. Step 4: Simplify right side
    13,352.80x = 173,747,474.88
  5. Step 5: Solve for x
    x = 173,747,474.88/13,352.80
  6. Step 6: Final answer
    x = 13,012.06

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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.