Home / 20,011.35-29,989.32-7,518.81

Finding the Fourth Proportional to 20,011.35, 29,989.32 and 7,518.81

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Solution

The fourth proportional to 20,011.35, 29,989.32 and 7,518.81 is: 11,267.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,011.35 : 29,989.32 = 7,518.81 : x
  2. Step 2: Convert to fraction form
    20,011.35/29,989.32 = 7,518.81/x
  3. Step 3: Cross multiply
    20,011.35x = 29,989.32 × 7,518.81
  4. Step 4: Simplify right side
    20,011.35x = 225,483,999.11
  5. Step 5: Solve for x
    x = 225,483,999.11/20,011.35
  6. Step 6: Final answer
    x = 11,267.81

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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.