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Finding the Fourth Proportional to 19,658.20, 29,487.30 and 5,807.20

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Solution

The fourth proportional to 19,658.20, 29,487.30 and 5,807.20 is: 8,710.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,658.20 : 29,487.30 = 5,807.20 : x
  2. Step 2: Convert to fraction form
    19,658.20/29,487.30 = 5,807.20/x
  3. Step 3: Cross multiply
    19,658.20x = 29,487.30 × 5,807.20
  4. Step 4: Simplify right side
    19,658.20x = 171,238,648.56
  5. Step 5: Solve for x
    x = 171,238,648.56/19,658.20
  6. Step 6: Final answer
    x = 8,710.80

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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.