Home / 28,279.94-39,024.59-15,530.64

Finding the Fourth Proportional to 28,279.94, 39,024.59 and 15,530.64

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Solution

The fourth proportional to 28,279.94, 39,024.59 and 15,530.64 is: 21,431.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,279.94 : 39,024.59 = 15,530.64 : x
  2. Step 2: Convert to fraction form
    28,279.94/39,024.59 = 15,530.64/x
  3. Step 3: Cross multiply
    28,279.94x = 39,024.59 × 15,530.64
  4. Step 4: Simplify right side
    28,279.94x = 606,076,634.44
  5. Step 5: Solve for x
    x = 606,076,634.44/28,279.94
  6. Step 6: Final answer
    x = 21,431.33

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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.