Home / 20,635.12-30,995.34-16,690.78

Finding the Fourth Proportional to 20,635.12, 30,995.34 and 16,690.78

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Solution

The fourth proportional to 20,635.12, 30,995.34 and 16,690.78 is: 25,070.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,635.12 : 30,995.34 = 16,690.78 : x
  2. Step 2: Convert to fraction form
    20,635.12/30,995.34 = 16,690.78/x
  3. Step 3: Cross multiply
    20,635.12x = 30,995.34 × 16,690.78
  4. Step 4: Simplify right side
    20,635.12x = 517,336,162.53
  5. Step 5: Solve for x
    x = 517,336,162.53/20,635.12
  6. Step 6: Final answer
    x = 25,070.67

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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.