Home / 21,171.87-29,216.94-12,219.18

Finding the Fourth Proportional to 21,171.87, 29,216.94 and 12,219.18

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Solution

The fourth proportional to 21,171.87, 29,216.94 and 12,219.18 is: 16,862.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,171.87 : 29,216.94 = 12,219.18 : x
  2. Step 2: Convert to fraction form
    21,171.87/29,216.94 = 12,219.18/x
  3. Step 3: Cross multiply
    21,171.87x = 29,216.94 × 12,219.18
  4. Step 4: Simplify right side
    21,171.87x = 357,007,048.91
  5. Step 5: Solve for x
    x = 357,007,048.91/21,171.87
  6. Step 6: Final answer
    x = 16,862.33

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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.