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Finding the Fourth Proportional to 19,772.40, 29,658.60 and 10,408.80

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Solution

The fourth proportional to 19,772.40, 29,658.60 and 10,408.80 is: 15,613.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,772.40 : 29,658.60 = 10,408.80 : x
  2. Step 2: Convert to fraction form
    19,772.40/29,658.60 = 10,408.80/x
  3. Step 3: Cross multiply
    19,772.40x = 29,658.60 × 10,408.80
  4. Step 4: Simplify right side
    19,772.40x = 308,710,435.68
  5. Step 5: Solve for x
    x = 308,710,435.68/19,772.40
  6. Step 6: Final answer
    x = 15,613.20

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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.