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Finding the Fourth Proportional to 19,980.60, 29,906.10 and 14,148.60

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Solution

The fourth proportional to 19,980.60, 29,906.10 and 14,148.60 is: 21,177.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,980.60 : 29,906.10 = 14,148.60 : x
  2. Step 2: Convert to fraction form
    19,980.60/29,906.10 = 14,148.60/x
  3. Step 3: Cross multiply
    19,980.60x = 29,906.10 × 14,148.60
  4. Step 4: Simplify right side
    19,980.60x = 423,129,446.46
  5. Step 5: Solve for x
    x = 423,129,446.46/19,980.60
  6. Step 6: Final answer
    x = 21,177.01

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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.