Home / 20,135.55-30,211.83-10,135.08

Finding the Fourth Proportional to 20,135.55, 30,211.83 and 10,135.08

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Solution

The fourth proportional to 20,135.55, 30,211.83 and 10,135.08 is: 15,206.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,135.55 : 30,211.83 = 10,135.08 : x
  2. Step 2: Convert to fraction form
    20,135.55/30,211.83 = 10,135.08/x
  3. Step 3: Cross multiply
    20,135.55x = 30,211.83 × 10,135.08
  4. Step 4: Simplify right side
    20,135.55x = 306,199,314.00
  5. Step 5: Solve for x
    x = 306,199,314.00/20,135.55
  6. Step 6: Final answer
    x = 15,206.90

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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.