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Finding the Fourth Proportional to 21,491.62, 29,657.95 and 11,930.95

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Solution

The fourth proportional to 21,491.62, 29,657.95 and 11,930.95 is: 16,464.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,491.62 : 29,657.95 = 11,930.95 : x
  2. Step 2: Convert to fraction form
    21,491.62/29,657.95 = 11,930.95/x
  3. Step 3: Cross multiply
    21,491.62x = 29,657.95 × 11,930.95
  4. Step 4: Simplify right side
    21,491.62x = 353,847,518.55
  5. Step 5: Solve for x
    x = 353,847,518.55/21,491.62
  6. Step 6: Final answer
    x = 16,464.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.