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Finding the Fourth Proportional to 19,493.56, 29,243.49 and 7,640.91

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Solution

The fourth proportional to 19,493.56, 29,243.49 and 7,640.91 is: 11,462.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,493.56 : 29,243.49 = 7,640.91 : x
  2. Step 2: Convert to fraction form
    19,493.56/29,243.49 = 7,640.91/x
  3. Step 3: Cross multiply
    19,493.56x = 29,243.49 × 7,640.91
  4. Step 4: Simplify right side
    19,493.56x = 223,446,875.18
  5. Step 5: Solve for x
    x = 223,446,875.18/19,493.56
  6. Step 6: Final answer
    x = 11,462.60

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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.