Home / 21,139.71-29,181.03-12,194.88

Finding the Fourth Proportional to 21,139.71, 29,181.03 and 12,194.88

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Solution

The fourth proportional to 21,139.71, 29,181.03 and 12,194.88 is: 16,833.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,139.71 : 29,181.03 = 12,194.88 : x
  2. Step 2: Convert to fraction form
    21,139.71/29,181.03 = 12,194.88/x
  3. Step 3: Cross multiply
    21,139.71x = 29,181.03 × 12,194.88
  4. Step 4: Simplify right side
    21,139.71x = 355,859,159.13
  5. Step 5: Solve for x
    x = 355,859,159.13/21,139.71
  6. Step 6: Final answer
    x = 16,833.68

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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.