Home / 20,743.84-31,039.14-12,429.72

Finding the Fourth Proportional to 20,743.84, 31,039.14 and 12,429.72

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Solution

The fourth proportional to 20,743.84, 31,039.14 and 12,429.72 is: 18,598.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,743.84 : 31,039.14 = 12,429.72 : x
  2. Step 2: Convert to fraction form
    20,743.84/31,039.14 = 12,429.72/x
  3. Step 3: Cross multiply
    20,743.84x = 31,039.14 × 12,429.72
  4. Step 4: Simplify right side
    20,743.84x = 385,807,819.24
  5. Step 5: Solve for x
    x = 385,807,819.24/20,743.84
  6. Step 6: Final answer
    x = 18,598.67

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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.