Home / 28,128.62-38,816.79-15,381.88

Finding the Fourth Proportional to 28,128.62, 38,816.79 and 15,381.88

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Solution

The fourth proportional to 28,128.62, 38,816.79 and 15,381.88 is: 21,226.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,128.62 : 38,816.79 = 15,381.88 : x
  2. Step 2: Convert to fraction form
    28,128.62/38,816.79 = 15,381.88/x
  3. Step 3: Cross multiply
    28,128.62x = 38,816.79 × 15,381.88
  4. Step 4: Simplify right side
    28,128.62x = 597,075,244.22
  5. Step 5: Solve for x
    x = 597,075,244.22/28,128.62
  6. Step 6: Final answer
    x = 21,226.61

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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.