Home / 15,529.38-21,429.12-8,815.29

Finding the Fourth Proportional to 15,529.38, 21,429.12 and 8,815.29

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Solution

The fourth proportional to 15,529.38, 21,429.12 and 8,815.29 is: 12,164.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,529.38 : 21,429.12 = 8,815.29 : x
  2. Step 2: Convert to fraction form
    15,529.38/21,429.12 = 8,815.29/x
  3. Step 3: Cross multiply
    15,529.38x = 21,429.12 × 8,815.29
  4. Step 4: Simplify right side
    15,529.38x = 188,903,907.24
  5. Step 5: Solve for x
    x = 188,903,907.24/15,529.38
  6. Step 6: Final answer
    x = 12,164.29

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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.