Home / 28,290.20-39,039.72-15,714.12

Finding the Fourth Proportional to 28,290.20, 39,039.72 and 15,714.12

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Solution

The fourth proportional to 28,290.20, 39,039.72 and 15,714.12 is: 21,685.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,290.20 : 39,039.72 = 15,714.12 : x
  2. Step 2: Convert to fraction form
    28,290.20/39,039.72 = 15,714.12/x
  3. Step 3: Cross multiply
    28,290.20x = 39,039.72 × 15,714.12
  4. Step 4: Simplify right side
    28,290.20x = 613,474,844.85
  5. Step 5: Solve for x
    x = 613,474,844.85/28,290.20
  6. Step 6: Final answer
    x = 21,685.07

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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.