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Finding the Fourth Proportional to 19,662.80, 29,513.40 and 9,813.20

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Solution

The fourth proportional to 19,662.80, 29,513.40 and 9,813.20 is: 14,729.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,662.80 : 29,513.40 = 9,813.20 : x
  2. Step 2: Convert to fraction form
    19,662.80/29,513.40 = 9,813.20/x
  3. Step 3: Cross multiply
    19,662.80x = 29,513.40 × 9,813.20
  4. Step 4: Simplify right side
    19,662.80x = 289,620,896.88
  5. Step 5: Solve for x
    x = 289,620,896.88/19,662.80
  6. Step 6: Final answer
    x = 14,729.38

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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.