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Finding the Fourth Proportional to 14,419.70, 21,641.70 and 5,660.76

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Solution

The fourth proportional to 14,419.70, 21,641.70 and 5,660.76 is: 8,495.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,419.70 : 21,641.70 = 5,660.76 : x
  2. Step 2: Convert to fraction form
    14,419.70/21,641.70 = 5,660.76/x
  3. Step 3: Cross multiply
    14,419.70x = 21,641.70 × 5,660.76
  4. Step 4: Simplify right side
    14,419.70x = 122,508,469.69
  5. Step 5: Solve for x
    x = 122,508,469.69/14,419.70
  6. Step 6: Final answer
    x = 8,495.91

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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.