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Finding the Fourth Proportional to 19,658.89, 29,345.80 and 18,195.48

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Solution

The fourth proportional to 19,658.89, 29,345.80 and 18,195.48 is: 27,161.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,658.89 : 29,345.80 = 18,195.48 : x
  2. Step 2: Convert to fraction form
    19,658.89/29,345.80 = 18,195.48/x
  3. Step 3: Cross multiply
    19,658.89x = 29,345.80 × 18,195.48
  4. Step 4: Simplify right side
    19,658.89x = 533,960,871.50
  5. Step 5: Solve for x
    x = 533,960,871.50/19,658.89
  6. Step 6: Final answer
    x = 27,161.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.