Home / 15,884.78-21,907.41-12,858.35

Finding the Fourth Proportional to 15,884.78, 21,907.41 and 12,858.35

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Solution

The fourth proportional to 15,884.78, 21,907.41 and 12,858.35 is: 17,733.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,884.78 : 21,907.41 = 12,858.35 : x
  2. Step 2: Convert to fraction form
    15,884.78/21,907.41 = 12,858.35/x
  3. Step 3: Cross multiply
    15,884.78x = 21,907.41 × 12,858.35
  4. Step 4: Simplify right side
    15,884.78x = 281,693,145.37
  5. Step 5: Solve for x
    x = 281,693,145.37/15,884.78
  6. Step 6: Final answer
    x = 17,733.53

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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.