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Finding the Fourth Proportional to 20,004.70, 29,949.45 and 19,428.70

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Solution

The fourth proportional to 20,004.70, 29,949.45 and 19,428.70 is: 29,087.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,004.70 : 29,949.45 = 19,428.70 : x
  2. Step 2: Convert to fraction form
    20,004.70/29,949.45 = 19,428.70/x
  3. Step 3: Cross multiply
    20,004.70x = 29,949.45 × 19,428.70
  4. Step 4: Simplify right side
    20,004.70x = 581,878,879.22
  5. Step 5: Solve for x
    x = 581,878,879.22/20,004.70
  6. Step 6: Final answer
    x = 29,087.11

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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.