Home / 20,318.10-30,477.82-6,990.96

Finding the Fourth Proportional to 20,318.10, 30,477.82 and 6,990.96

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Solution

The fourth proportional to 20,318.10, 30,477.82 and 6,990.96 is: 10,486.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,318.10 : 30,477.82 = 6,990.96 : x
  2. Step 2: Convert to fraction form
    20,318.10/30,477.82 = 6,990.96/x
  3. Step 3: Cross multiply
    20,318.10x = 30,477.82 × 6,990.96
  4. Step 4: Simplify right side
    20,318.10x = 213,069,220.51
  5. Step 5: Solve for x
    x = 213,069,220.51/20,318.10
  6. Step 6: Final answer
    x = 10,486.67

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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.