Home / 20,858.10-31,319.55-12,110.10

Finding the Fourth Proportional to 20,858.10, 31,319.55 and 12,110.10

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Solution

The fourth proportional to 20,858.10, 31,319.55 and 12,110.10 is: 18,183.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,858.10 : 31,319.55 = 12,110.10 : x
  2. Step 2: Convert to fraction form
    20,858.10/31,319.55 = 12,110.10/x
  3. Step 3: Cross multiply
    20,858.10x = 31,319.55 × 12,110.10
  4. Step 4: Simplify right side
    20,858.10x = 379,282,882.46
  5. Step 5: Solve for x
    x = 379,282,882.46/20,858.10
  6. Step 6: Final answer
    x = 18,183.96

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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.