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Finding the Fourth Proportional to 14,661.70, 21,992.55 and 5,431.30

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Solution

The fourth proportional to 14,661.70, 21,992.55 and 5,431.30 is: 8,146.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,661.70 : 21,992.55 = 5,431.30 : x
  2. Step 2: Convert to fraction form
    14,661.70/21,992.55 = 5,431.30/x
  3. Step 3: Cross multiply
    14,661.70x = 21,992.55 × 5,431.30
  4. Step 4: Simplify right side
    14,661.70x = 119,448,136.82
  5. Step 5: Solve for x
    x = 119,448,136.82/14,661.70
  6. Step 6: Final answer
    x = 8,146.95

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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.