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Finding the Fourth Proportional to 19,778.80, 29,658.60 and 11,004.40

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Solution

The fourth proportional to 19,778.80, 29,658.60 and 11,004.40 is: 16,501.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,778.80 : 29,658.60 = 11,004.40 : x
  2. Step 2: Convert to fraction form
    19,778.80/29,658.60 = 11,004.40/x
  3. Step 3: Cross multiply
    19,778.80x = 29,658.60 × 11,004.40
  4. Step 4: Simplify right side
    19,778.80x = 326,375,097.84
  5. Step 5: Solve for x
    x = 326,375,097.84/19,778.80
  6. Step 6: Final answer
    x = 16,501.26

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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.