Home / 20,991.24-31,479.28-6,948.67

Finding the Fourth Proportional to 20,991.24, 31,479.28 and 6,948.67

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Solution

The fourth proportional to 20,991.24, 31,479.28 and 6,948.67 is: 10,420.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,991.24 : 31,479.28 = 6,948.67 : x
  2. Step 2: Convert to fraction form
    20,991.24/31,479.28 = 6,948.67/x
  3. Step 3: Cross multiply
    20,991.24x = 31,479.28 × 6,948.67
  4. Step 4: Simplify right side
    20,991.24x = 218,739,128.56
  5. Step 5: Solve for x
    x = 218,739,128.56/20,991.24
  6. Step 6: Final answer
    x = 10,420.50

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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.