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Finding the Fourth Proportional to 20,603.60, 30,905.40 and 14,042.60

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Solution

The fourth proportional to 20,603.60, 30,905.40 and 14,042.60 is: 21,063.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.60 : 30,905.40 = 14,042.60 : x
  2. Step 2: Convert to fraction form
    20,603.60/30,905.40 = 14,042.60/x
  3. Step 3: Cross multiply
    20,603.60x = 30,905.40 × 14,042.60
  4. Step 4: Simplify right side
    20,603.60x = 433,992,170.04
  5. Step 5: Solve for x
    x = 433,992,170.04/20,603.60
  6. Step 6: Final answer
    x = 21,063.90

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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.