Home / 20,764.40-31,146.60-12,453.80

Finding the Fourth Proportional to 20,764.40, 31,146.60 and 12,453.80

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Solution

The fourth proportional to 20,764.40, 31,146.60 and 12,453.80 is: 18,680.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,764.40 : 31,146.60 = 12,453.80 : x
  2. Step 2: Convert to fraction form
    20,764.40/31,146.60 = 12,453.80/x
  3. Step 3: Cross multiply
    20,764.40x = 31,146.60 × 12,453.80
  4. Step 4: Simplify right side
    20,764.40x = 387,893,527.08
  5. Step 5: Solve for x
    x = 387,893,527.08/20,764.40
  6. Step 6: Final answer
    x = 18,680.70

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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.