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Finding the Fourth Proportional to 20,671.65, 30,982.86 and 14,397.71

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Solution

The fourth proportional to 20,671.65, 30,982.86 and 14,397.71 is: 21,579.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,671.65 : 30,982.86 = 14,397.71 : x
  2. Step 2: Convert to fraction form
    20,671.65/30,982.86 = 14,397.71/x
  3. Step 3: Cross multiply
    20,671.65x = 30,982.86 × 14,397.71
  4. Step 4: Simplify right side
    20,671.65x = 446,082,078.34
  5. Step 5: Solve for x
    x = 446,082,078.34/20,671.65
  6. Step 6: Final answer
    x = 21,579.41

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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.