Home / 21,079.63-29,086.90-12,123.87

Finding the Fourth Proportional to 21,079.63, 29,086.90 and 12,123.87

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Solution

The fourth proportional to 21,079.63, 29,086.90 and 12,123.87 is: 16,729.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,079.63 : 29,086.90 = 12,123.87 : x
  2. Step 2: Convert to fraction form
    21,079.63/29,086.90 = 12,123.87/x
  3. Step 3: Cross multiply
    21,079.63x = 29,086.90 × 12,123.87
  4. Step 4: Simplify right side
    21,079.63x = 352,645,794.30
  5. Step 5: Solve for x
    x = 352,645,794.30/21,079.63
  6. Step 6: Final answer
    x = 16,729.22

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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.