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Finding the Fourth Proportional to 20,609.10, 31,068.10 and 19,235.88

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Solution

The fourth proportional to 20,609.10, 31,068.10 and 19,235.88 is: 28,997.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,609.10 : 31,068.10 = 19,235.88 : x
  2. Step 2: Convert to fraction form
    20,609.10/31,068.10 = 19,235.88/x
  3. Step 3: Cross multiply
    20,609.10x = 31,068.10 × 19,235.88
  4. Step 4: Simplify right side
    20,609.10x = 597,622,243.43
  5. Step 5: Solve for x
    x = 597,622,243.43/20,609.10
  6. Step 6: Final answer
    x = 28,997.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.