Home / 20,463.60-30,716.46-12,690.84

Finding the Fourth Proportional to 20,463.60, 30,716.46 and 12,690.84

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Solution

The fourth proportional to 20,463.60, 30,716.46 and 12,690.84 is: 19,049.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,463.60 : 30,716.46 = 12,690.84 : x
  2. Step 2: Convert to fraction form
    20,463.60/30,716.46 = 12,690.84/x
  3. Step 3: Cross multiply
    20,463.60x = 30,716.46 × 12,690.84
  4. Step 4: Simplify right side
    20,463.60x = 389,817,679.23
  5. Step 5: Solve for x
    x = 389,817,679.23/20,463.60
  6. Step 6: Final answer
    x = 19,049.32

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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.