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Finding the Fourth Proportional to 14,499.50, 20,009.30 and 8,211.87

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Solution

The fourth proportional to 14,499.50, 20,009.30 and 8,211.87 is: 11,332.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,499.50 : 20,009.30 = 8,211.87 : x
  2. Step 2: Convert to fraction form
    14,499.50/20,009.30 = 8,211.87/x
  3. Step 3: Cross multiply
    14,499.50x = 20,009.30 × 8,211.87
  4. Step 4: Simplify right side
    14,499.50x = 164,313,729.33
  5. Step 5: Solve for x
    x = 164,313,729.33/14,499.50
  6. Step 6: Final answer
    x = 11,332.38

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1.5x scale

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.