Home / 21,619.77-29,836.68-12,188.94

Finding the Fourth Proportional to 21,619.77, 29,836.68 and 12,188.94

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Solution

The fourth proportional to 21,619.77, 29,836.68 and 12,188.94 is: 16,821.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,619.77 : 29,836.68 = 12,188.94 : x
  2. Step 2: Convert to fraction form
    21,619.77/29,836.68 = 12,188.94/x
  3. Step 3: Cross multiply
    21,619.77x = 29,836.68 × 12,188.94
  4. Step 4: Simplify right side
    21,619.77x = 363,677,502.32
  5. Step 5: Solve for x
    x = 363,677,502.32/21,619.77
  6. Step 6: Final answer
    x = 16,821.53

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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.