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Finding the Fourth Proportional to 13,953.03, 20,931.48 and 7,379.68

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Solution

The fourth proportional to 13,953.03, 20,931.48 and 7,379.68 is: 11,070.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,953.03 : 20,931.48 = 7,379.68 : x
  2. Step 2: Convert to fraction form
    13,953.03/20,931.48 = 7,379.68/x
  3. Step 3: Cross multiply
    13,953.03x = 20,931.48 × 7,379.68
  4. Step 4: Simplify right side
    13,953.03x = 154,467,624.33
  5. Step 5: Solve for x
    x = 154,467,624.33/13,953.03
  6. Step 6: Final answer
    x = 11,070.54

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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.