Home / 21,170.13-29,212.68-12,220.52

Finding the Fourth Proportional to 21,170.13, 29,212.68 and 12,220.52

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Solution

The fourth proportional to 21,170.13, 29,212.68 and 12,220.52 is: 16,863.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,170.13 : 29,212.68 = 12,220.52 : x
  2. Step 2: Convert to fraction form
    21,170.13/29,212.68 = 12,220.52/x
  3. Step 3: Cross multiply
    21,170.13x = 29,212.68 × 12,220.52
  4. Step 4: Simplify right side
    21,170.13x = 356,994,101.17
  5. Step 5: Solve for x
    x = 356,994,101.17/21,170.13
  6. Step 6: Final answer
    x = 16,863.10

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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.