Home / 21,172.04-29,218.74-12,221.18

Finding the Fourth Proportional to 21,172.04, 29,218.74 and 12,221.18

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Solution

The fourth proportional to 21,172.04, 29,218.74 and 12,221.18 is: 16,865.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172.04 : 29,218.74 = 12,221.18 : x
  2. Step 2: Convert to fraction form
    21,172.04/29,218.74 = 12,221.18/x
  3. Step 3: Cross multiply
    21,172.04x = 29,218.74 × 12,221.18
  4. Step 4: Simplify right side
    21,172.04x = 357,087,480.91
  5. Step 5: Solve for x
    x = 357,087,480.91/21,172.04
  6. Step 6: Final answer
    x = 16,865.99

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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.