Home / 20,788.48-28,688.13-11,835.98

Finding the Fourth Proportional to 20,788.48, 28,688.13 and 11,835.98

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Solution

The fourth proportional to 20,788.48, 28,688.13 and 11,835.98 is: 16,333.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.48 : 28,688.13 = 11,835.98 : x
  2. Step 2: Convert to fraction form
    20,788.48/28,688.13 = 11,835.98/x
  3. Step 3: Cross multiply
    20,788.48x = 28,688.13 × 11,835.98
  4. Step 4: Simplify right side
    20,788.48x = 339,552,132.92
  5. Step 5: Solve for x
    x = 339,552,132.92/20,788.48
  6. Step 6: Final answer
    x = 16,333.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.