Home / 20,709.76-31,063.98-12,333.72

Finding the Fourth Proportional to 20,709.76, 31,063.98 and 12,333.72

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Solution

The fourth proportional to 20,709.76, 31,063.98 and 12,333.72 is: 18,500.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,709.76 : 31,063.98 = 12,333.72 : x
  2. Step 2: Convert to fraction form
    20,709.76/31,063.98 = 12,333.72/x
  3. Step 3: Cross multiply
    20,709.76x = 31,063.98 × 12,333.72
  4. Step 4: Simplify right side
    20,709.76x = 383,134,431.41
  5. Step 5: Solve for x
    x = 383,134,431.41/20,709.76
  6. Step 6: Final answer
    x = 18,500.19

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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.