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Finding the Fourth Proportional to 19,857.40, 29,765.10 and 7,369.40

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Solution

The fourth proportional to 19,857.40, 29,765.10 and 7,369.40 is: 11,046.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,857.40 : 29,765.10 = 7,369.40 : x
  2. Step 2: Convert to fraction form
    19,857.40/29,765.10 = 7,369.40/x
  3. Step 3: Cross multiply
    19,857.40x = 29,765.10 × 7,369.40
  4. Step 4: Simplify right side
    19,857.40x = 219,350,927.94
  5. Step 5: Solve for x
    x = 219,350,927.94/19,857.40
  6. Step 6: Final answer
    x = 11,046.31

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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.