Home / 21,103.13-29,123.23-11,671.70

Finding the Fourth Proportional to 21,103.13, 29,123.23 and 11,671.70

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Solution

The fourth proportional to 21,103.13, 29,123.23 and 11,671.70 is: 16,107.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,103.13 : 29,123.23 = 11,671.70 : x
  2. Step 2: Convert to fraction form
    21,103.13/29,123.23 = 11,671.70/x
  3. Step 3: Cross multiply
    21,103.13x = 29,123.23 × 11,671.70
  4. Step 4: Simplify right side
    21,103.13x = 339,917,428.80
  5. Step 5: Solve for x
    x = 339,917,428.80/21,103.13
  6. Step 6: Final answer
    x = 16,107.45

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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.