Home / 20,990.24-31,477.78-6,947.67

Finding the Fourth Proportional to 20,990.24, 31,477.78 and 6,947.67

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Solution

The fourth proportional to 20,990.24, 31,477.78 and 6,947.67 is: 10,419.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,990.24 : 31,477.78 = 6,947.67 : x
  2. Step 2: Convert to fraction form
    20,990.24/31,477.78 = 6,947.67/x
  3. Step 3: Cross multiply
    20,990.24x = 31,477.78 × 6,947.67
  4. Step 4: Simplify right side
    20,990.24x = 218,697,354.50
  5. Step 5: Solve for x
    x = 218,697,354.50/20,990.24
  6. Step 6: Final answer
    x = 10,419.00

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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.