Home / 13,780.80-20,690.40-8,596.80

Finding the Fourth Proportional to 13,780.80, 20,690.40 and 8,596.80

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Solution

The fourth proportional to 13,780.80, 20,690.40 and 8,596.80 is: 12,907.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.80 : 20,690.40 = 8,596.80 : x
  2. Step 2: Convert to fraction form
    13,780.80/20,690.40 = 8,596.80/x
  3. Step 3: Cross multiply
    13,780.80x = 20,690.40 × 8,596.80
  4. Step 4: Simplify right side
    13,780.80x = 177,871,230.72
  5. Step 5: Solve for x
    x = 177,871,230.72/13,780.80
  6. Step 6: Final answer
    x = 12,907.18

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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.