Home / 21,605.20-29,814.69-12,172.75

Finding the Fourth Proportional to 21,605.20, 29,814.69 and 12,172.75

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Solution

The fourth proportional to 21,605.20, 29,814.69 and 12,172.75 is: 16,798.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,605.20 : 29,814.69 = 12,172.75 : x
  2. Step 2: Convert to fraction form
    21,605.20/29,814.69 = 12,172.75/x
  3. Step 3: Cross multiply
    21,605.20x = 29,814.69 × 12,172.75
  4. Step 4: Simplify right side
    21,605.20x = 362,926,767.70
  5. Step 5: Solve for x
    x = 362,926,767.70/21,605.20
  6. Step 6: Final answer
    x = 16,798.12

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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.