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Finding the Fourth Proportional to 13,658.48, 20,486.72 and 5,336.96

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Solution

The fourth proportional to 13,658.48, 20,486.72 and 5,336.96 is: 8,005.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,658.48 : 20,486.72 = 5,336.96 : x
  2. Step 2: Convert to fraction form
    13,658.48/20,486.72 = 5,336.96/x
  3. Step 3: Cross multiply
    13,658.48x = 20,486.72 × 5,336.96
  4. Step 4: Simplify right side
    13,658.48x = 109,336,805.17
  5. Step 5: Solve for x
    x = 109,336,805.17/13,658.48
  6. Step 6: Final answer
    x = 8,005.05

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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.